Car Is Off The Road For A While...
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Car Is Off The Road For A While...
As some of you may well know I recently had a problem with my Spec C with the coolant system.
After carrying out various tests and trying to bleed out the coolant system, fitting a new uprated radiator cap (in case the old one had gone weak and was allowing coolant to be dumped straight into the expansion bottle). The problem is that under load/boost the issue occured and then you can hear the boiling coolant forcing it's way out of the expansion bottle.
So now I am faced with two choices:
1. Fit new uprated head gaskets (Cometic or Cosworth) plus an 11mm ARP head stud conversion.
2. Includes the above but also has forged Mahle pistons, ACL race bearings and bolts, plus a few other necessary jobs when the crankcase is split.
I am leaning towards option 2 but this means bang goes my plans for the Scoobyclinic SC46 turbo (well for the forseeable future anyway).
Never mind I suppose it's all part of the joys of owning an Impreza, and I had always thought the JDM twin scroll engines were pretty much bomb proof.
So you won't be seeing the Spec C at the meets for a while, and a big thank you to Dylan from me for all his assistance and for the forthcoming work.
After carrying out various tests and trying to bleed out the coolant system, fitting a new uprated radiator cap (in case the old one had gone weak and was allowing coolant to be dumped straight into the expansion bottle). The problem is that under load/boost the issue occured and then you can hear the boiling coolant forcing it's way out of the expansion bottle.
So now I am faced with two choices:
1. Fit new uprated head gaskets (Cometic or Cosworth) plus an 11mm ARP head stud conversion.
2. Includes the above but also has forged Mahle pistons, ACL race bearings and bolts, plus a few other necessary jobs when the crankcase is split.
I am leaning towards option 2 but this means bang goes my plans for the Scoobyclinic SC46 turbo (well for the forseeable future anyway).
Never mind I suppose it's all part of the joys of owning an Impreza, and I had always thought the JDM twin scroll engines were pretty much bomb proof.
So you won't be seeing the Spec C at the meets for a while, and a big thank you to Dylan from me for all his assistance and for the forthcoming work.
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I'm sorry to hear of your nitemare mate, cracking car you got there..
If i was you and from experience, I'd change the headgasket nd bolts, Check it doesnt need skimming. Then put it back together.. Modding stuff never ends lol.. I'm learning the hard way.. Skint.com lol..
If i was you and from experience, I'd change the headgasket nd bolts, Check it doesnt need skimming. Then put it back together.. Modding stuff never ends lol.. I'm learning the hard way.. Skint.com lol..
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Personally i'd just do the headgaskets, the number of built engines that i've heard of going wrong shortly after being built is stupid.... Unless your planning on running big power i dont think its worth the risk.
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I'm sorry to hear of your nitemare mate, cracking car you got there..
If i was you and from experience, I'd change the headgasket nd bolts, Check it doesnt need skimming. Then put it back together.. Modding stuff never ends lol.. I'm learning the hard way.. Skint.com lol..
If i was you and from experience, I'd change the headgasket nd bolts, Check it doesnt need skimming. Then put it back together.. Modding stuff never ends lol.. I'm learning the hard way.. Skint.com lol..
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Cheers Merv, how's the car hunting going?
Well about 420bhp I suppose and the JDM engine is reputed to be good for 500bhp in standard form, I can see the logic about not disturbing what hasn't failed and the bearings or pistons haven't failed so I could be asking for trouble.
Well about 420bhp I suppose and the JDM engine is reputed to be good for 500bhp in standard form, I can see the logic about not disturbing what hasn't failed and the bearings or pistons haven't failed so I could be asking for trouble.
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Cheers Merv, how's the car hunting going?
Well about 420bhp I suppose and the JDM engine is reputed to be good for 500bhp in standard form, I can see the logic about not disturbing what hasn't failed and the bearings or pistons haven't failed so I could be asking for trouble.
Well about 420bhp I suppose and the JDM engine is reputed to be good for 500bhp in standard form, I can see the logic about not disturbing what hasn't failed and the bearings or pistons haven't failed so I could be asking for trouble.
If it aint broke, don't fix it
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Sorry to here this, So has the head gasket gone, I had a over heating problem on my old blue car, couldn't work out where it was, it turned out to be a new samco hose, that had de-lambed inside, twisted and blocked the flow from the expansion tank.
Just get it back running and worry about forged bits once you've broken it.
Merv, have you sold the M5??
Just get it back running and worry about forged bits once you've broken it.
Merv, have you sold the M5??
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Sorry to hear this Ty , gutted for you mate. They don't half try your patience these jap cars from time to time!!
I had the exact same situation with mine last year and it aint nice at all, get ya gaskets done and save ya dolly for a rainy day i rekon!!!
good luck with her, sure she's in more than capable hands.
Rob
I had the exact same situation with mine last year and it aint nice at all, get ya gaskets done and save ya dolly for a rainy day i rekon!!!
good luck with her, sure she's in more than capable hands.
Rob
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Sad news Ty - Sorry to hear that Mate I know what it's like only too well, I echo some of the others don't fix what aint broke Mate and take it from there, when Dylan gets you back on the road
I'm sure that won't take too long - got everything crossed for you Ty
I'm sure that won't take too long - got everything crossed for you Ty
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Sorry to hear this Ty. When mine went bang I took option 2. Mahle pistons are alot cheaper than the subaru option, and if you're splitting the block then you might as well fit the ACL bearings. I can recommend advanced automotive in Bristol (as per the man himself) for the parts. If you need spare piston rings I have 3 sets here.
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Sorry to hear this Ty. When mine went bang I took option 2. Mahle pistons are alot cheaper than the subaru option, and if you're splitting the block then you might as well fit the ACL bearings. I can recommend advanced automotive in Bristol (as per the man himself) for the parts. If you need spare piston rings I have 3 sets here.
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Sorry to here this, So has the head gasket gone, I had a over heating problem on my old blue car, couldn't work out where it was, it turned out to be a new samco hose, that had de-lambed inside, twisted and blocked the flow from the expansion tank.
Just get it back running and worry about forged bits once you've broken it.
Merv, have you sold the M5??
Just get it back running and worry about forged bits once you've broken it.
Merv, have you sold the M5??
Sorry to hear this Ty , gutted for you mate. They don't half try your patience these jap cars from time to time!!
I had the exact same situation with mine last year and it aint nice at all, get ya gaskets done and save ya dolly for a rainy day i rekon!!!
good luck with her, sure she's in more than capable hands.
Rob
I had the exact same situation with mine last year and it aint nice at all, get ya gaskets done and save ya dolly for a rainy day i rekon!!!
good luck with her, sure she's in more than capable hands.
Rob
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Sorry to hear this Ty. When mine went bang I took option 2. Mahle pistons are alot cheaper than the subaru option, and if you're splitting the block then you might as well fit the ACL bearings. I can recommend advanced automotive in Bristol (as per the man himself) for the parts. If you need spare piston rings I have 3 sets here.
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The turbo will have to be put on hold for the moment anyway and the standard internals should cope with that kind of power with ease, but the head gaskets to be used will be uprated high performance items.
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Gutted Ty. I'm sure Dylan will have you back in business soon though. I can see your thinking on going for option 1, i'd be tempted to go for 2 while its all apart though, but its all down to money i suppose. Just don't rush your decision, plenty of time until the summer season starts. Looking forward to hearing that beauty screaming along with a big turbo.
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Sorry to hear your bad news Ty,hope you get it sorted ready for the sunny months !
But what is causing the coolant to blow back into the reservoir ?.Have the head gaskets started to weap or did it start after you did maintenance to it ,ie coolant change.
I know you know more than the average bear when it comes to all things mechanical but an air block could cause this and would be a bit cheaper to fix
Best off luck anyway, Good job you can trust Dylan to do a good job as this would cost a fortune at CVC (Cost Varies Completley) haha !!
See you soon peeps !
But what is causing the coolant to blow back into the reservoir ?.Have the head gaskets started to weap or did it start after you did maintenance to it ,ie coolant change.
I know you know more than the average bear when it comes to all things mechanical but an air block could cause this and would be a bit cheaper to fix
Best off luck anyway, Good job you can trust Dylan to do a good job as this would cost a fortune at CVC (Cost Varies Completley) haha !!
See you soon peeps !
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if head gasket has gone and depending on miles of engine i would refresh bottom end as i have heard of bottom ends following gasket fail few months down the line so get it done all in one go as it will cost u more in the long run,
not sure about why you want to fit an oil cooler ? if you don't track your car on a regular its not worth it as it can cause more problems
does your engine run high oil temps ? you would be better to just run a good oil like motul v300
lets hope you can get it sorted soon sorry t6o here this ty and if you need any help with anything im willing to give a hand just drop me a pm
not sure about why you want to fit an oil cooler ? if you don't track your car on a regular its not worth it as it can cause more problems
does your engine run high oil temps ? you would be better to just run a good oil like motul v300
lets hope you can get it sorted soon sorry t6o here this ty and if you need any help with anything im willing to give a hand just drop me a pm
#23
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Ty,
Why are you doing all this? What is the problem with the engine? I agree with Danny, find the cause before treating the symptoms, then progress. You could spend ££££££'s when it's something very minor.
Best of luck. I suppose I am down the list at Dylan's
Why are you doing all this? What is the problem with the engine? I agree with Danny, find the cause before treating the symptoms, then progress. You could spend ££££££'s when it's something very minor.
Best of luck. I suppose I am down the list at Dylan's
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Gutted Ty. I'm sure Dylan will have you back in business soon though. I can see your thinking on going for option 1, i'd be tempted to go for 2 while its all apart though, but its all down to money i suppose. Just don't rush your decision, plenty of time until the summer season starts. Looking forward to hearing that beauty screaming along with a big turbo.
Cheers Rich, although I'm not in a desperate rush to get it back on the road.
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Sorry to hear your bad news Ty,hope you get it sorted ready for the sunny months !
But what is causing the coolant to blow back into the reservoir ?.Have the head gaskets started to weap or did it start after you did maintenance to it ,ie coolant change.
I know you know more than the average bear when it comes to all things mechanical but an air block could cause this and would be a bit cheaper to fix
Best off luck anyway, Good job you can trust Dylan to do a good job as this would cost a fortune at CVC (Cost Varies Completley) haha !!
See you soon peeps !
But what is causing the coolant to blow back into the reservoir ?.Have the head gaskets started to weap or did it start after you did maintenance to it ,ie coolant change.
I know you know more than the average bear when it comes to all things mechanical but an air block could cause this and would be a bit cheaper to fix
Best off luck anyway, Good job you can trust Dylan to do a good job as this would cost a fortune at CVC (Cost Varies Completley) haha !!
See you soon peeps !
It happened after I had a coolant leak from the top rad hose (well I think it was anyway), the cooling system is pressurising when the engine is under load/boost and all the coolant ends up in the overflow resevoir as the radiator cap is opening up due to the pressure build up.
if head gasket has gone and depending on miles of engine i would refresh bottom end as i have heard of bottom ends following gasket fail few months down the line so get it done all in one go as it will cost u more in the long run,
not sure about why you want to fit an oil cooler ? if you don't track your car on a regular its not worth it as it can cause more problems
does your engine run high oil temps ? you would be better to just run a good oil like motul v300
lets hope you can get it sorted soon sorry t6o here this ty and if you need any help with anything im willing to give a hand just drop me a pm
not sure about why you want to fit an oil cooler ? if you don't track your car on a regular its not worth it as it can cause more problems
does your engine run high oil temps ? you would be better to just run a good oil like motul v300
lets hope you can get it sorted soon sorry t6o here this ty and if you need any help with anything im willing to give a hand just drop me a pm
Only when giving it the beans does everything go pear shaped and the problem arise.
List, what list?
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Ty i know you've probably checked but have you had a good look at the radiator.?
Reason being i noticed before xmas that mine dumped its coolant from the top hose i thought ,but on closer inspection it was a hairline crack around the back of the radiator at the top where the top hose goes in.This caused problems with my pressure (in more ways than one )
Surely a headgasket problem could be detected via a compression test or even if you have coolant in the oil or visa/versa.before you go ripping it apart.
As you said it started after a coolant loss from the top hose area you suspect.
Reason being i noticed before xmas that mine dumped its coolant from the top hose i thought ,but on closer inspection it was a hairline crack around the back of the radiator at the top where the top hose goes in.This caused problems with my pressure (in more ways than one )
Surely a headgasket problem could be detected via a compression test or even if you have coolant in the oil or visa/versa.before you go ripping it apart.
As you said it started after a coolant loss from the top hose area you suspect.
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Ty i know you've probably checked but have you had a good look at the radiator.?
Reason being i noticed before xmas that mine dumped its coolant from the top hose i thought ,but on closer inspection it was a hairline crack around the back of the radiator at the top where the top hose goes in.This caused problems with my pressure (in more ways than one )
Surely a headgasket problem could be detected via a compression test or even if you have coolant in the oil or visa/versa.before you go ripping it apart.
As you said it started after a coolant loss from the top hose area you suspect.
Reason being i noticed before xmas that mine dumped its coolant from the top hose i thought ,but on closer inspection it was a hairline crack around the back of the radiator at the top where the top hose goes in.This caused problems with my pressure (in more ways than one )
Surely a headgasket problem could be detected via a compression test or even if you have coolant in the oil or visa/versa.before you go ripping it apart.
As you said it started after a coolant loss from the top hose area you suspect.
The coolant is coming out of the hose that connects the overflow reservoir to the radiator, it's because of the pressure build up is opening the radiator cap as it should do but because the pressure is so high it's all going straight into the reservoir.
But I will re-check it just in case I might have missed something.
Sorry forgot to add there's no cross contamination of oil or water but what I'm 99.99% sure of is that the exhaust gases are forcing their way into the coolant under boost but as it only happens when on boost it's hard to replicate the problem when the car is static.
The problem first reared it's ugly head when one of the top radiator hose clips was loose.
Last edited by Cannon Fodder; 15 January 2011 at 04:48 PM.