Hi !
Here in Sweden some of us got big end failure.
And with some googling I could see that you have the same problem in Uk.
So what couses this problems ?
Canīt see that the engines knocked or something before the failure.
Talked with some tuningcompany here about the knocks but they say that itīs not the knockings that kills the bearings..well it may couse it if it knocks for veeeeeeeeeeery very loong time but a piston would fail first he sayed.

Between is it just v3-v4 wich have these problems ?
or even v5-v6?
Here we have even seen wrx(called GT) with big end failure.

Sorry for bad english ! hope U understand me anyway.
And we run 98ron or v-power(99ron) here.

 

I`ve heard that the oil pumps go weak with age and pressure drops, and that the relief valve can stick open.

 

okey ! thats why it is so many cosworth oilpumps for sale....

By the way.. Does anybody knows anything about BH Automotives in Doncastor ?
They have rebuilt a v5 engine after big end failure wich Im planing to buy ev....

 

Relief valve's stick and the back plate screw's that cover the pump gears come loose causing the pressure to drop also.
Another reason is bad upgrades with either poor maps or none at all when upgraded causing DET.

 

evening ryan incorrect oil change procedures

 

Evening Nick,very true also

 

Mild detting over a period of time will weaken the big end/s. They can then typically give up the ghost after a service, if the 'correct oil change procedure' isn't followed.

Sometimes, when people replace a failed head gasket in a mid-high miles car, the restored C.R. can also cause them to fail soon after. That's why, in such a scenario, a lot of specialists seriously advise on having a bottom-end refresh at the same time...

 

+1 John

 

what i could see on pistonheads no body wants to buy a engine rebuilt sti. The same with moded cars ...

 

If a rebuilt Subaru engine has been done by a reputable/well known/respected specialist, then it's prob worth a punt. Obviously backed up with appropriate invoices/receipts/plenty of history, etc...

 

yes,well very offen itīs private people wich rebuilt them .
Funny thing.. checked some on pistonheads(yes again) and more then half of them have the enginerebuilt :S

Have BH Automotives any good reputation in UK ?

 

I'd never buy a car with a rebuilt motor... done privately!!!

Too many massive unknowns - a huuuge leap of faith IMO!

 

^^ Mmmm, each to their own I guess although any one can do a good or bad job with a rebuild ... see Budgies TSL thread under Projects.

TX.

 

I'm not saying some privateers don't know what they're doing, etc.

Just that how is a potential buyer supposed to know whether it's gonna be okay?! Therein lies the rub.

At least if the motor's been rebuilt by the likes of API, RCM, Zen (when they did garage work), etc, etc., then you're seriously reducing the odds ending up with a dodgy motor, due to the 'knowns' of the expertise involved...

 

What happened to mine, aided by a bit, (a lot), of heatsoak.

 

Alcazar, was that when you booted it away from a toll booth in France one summer? Or was that someone else?

 

It's not a complex car Joz, any f*ckwit should be able to do a good job

TX.

 

if the rebuild has covered a few thousand miles i wouldnt be too bothered but a fresh one i would be a bit worried, they usually break quickly if not done right

 

+1 to that if it's done 3k plus and still sounds spot on then odd's are it will be fine.

 

That was it mate.

Outside temperatures of 40+ degrees, been giving it plenty on the motorway for an hour before, TMIC, running around 300bhp, got to a toll booth, queued briefly as I have a remote, and booted it away, within a mile the KL lit up like a Christmas tree, and oil pressure and oil temperature were going in different directions with the Defi alarms all going off

Warnings all too late, damage done

 

...Apart from the likes of me.

 

Did you kick yourself - you must've been gutted?!

Or were you philosophical about the whole thing?

 

That was it then : Heatsoak causing det = which lunched it. The most dangerous 1/2 mile you will ever drive in a Subaru is the one straight after long traffic delays or long traffic light waits. On a front mount no sweat, on a top mount, especially the dinky little ones on early cars- KABOOM.

Plus good fuel to keep it up there for octane helps - but cannot overcome the top mount problems.

Never heard of BH in Doncaster.

David APi

Our new rolling road is ready to roll.

Agents for:

Simtek, the most exciting new Ecu for years
Buddy Club exhausts
Hayward & Scott exhausts
Carbonetics clutches
BC suspension
Samco hose kits
Hybrid front mount intercooler kits
AP Racing brakes and clutches
Performance friction products

And of course; the well known APi Performance Exedy organic clutch

www.apiengines.com
www.apiimpreza.com

01926 614333

 

Maf's are also known to cause a problem! A damaged/dirty maf can cause the engine to run lean. This in turn makes the car work alot harder which equals running hotter & bang!!

 

Agree with the heatsoak theory,i have a primative temp probe in the rubber pipe from TMIC to throttle body, i know its not perfect nor 100% accurate,but its an aide nontheless.

driving along,temp read 29 on a summers day,parked up for 5 mins,engine off, on my way again and the reading was 64 !

it took 1 mile toget the reading back down to the 20`s

 

Should be called a interwarmer David

 

At the time I was gutted, even more so as wifey had said no to European get you home cover, so there went ANOTHER Ģ600

However, once I'd decided to rebuild.........

I was shown a LOT of kindness on here by a LOT of people, when it happened, particularly three who were brilliant.

 

That was your opinion at the time, plus I also remember you being VERY surprised it lasted as long as it did, after I told you the heads had been skimmed after a head gasket change, but thicker gaskets had not, to my knowledge been used, so INCREASING the compression ratio.

We live and learn. It costs some of us good money to do so.

Others, hopefully, benefit from our experiences.

 

NEVER take a Scoob to Europe without AA cover, it is a problem waiting to bite you on the bum. Especially if you are doing long motorway distances in hot weather.

David

 

Now, that doesn't exactly fill one with confidence, does it!

JohnD