2.5ltr classic's, how much oil do you burn
#151
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car was noisey but was told its piston slap as the forged piston need to warm up,
#153
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3 thou is the measurement we use in engineering to be honest it's old terms these days . Basically not even a *** paper clearance between piston and bore. Well yes forged piston do make a noise on cold start up but it should'nt be that bad . very light tap If measured correctly . Put it this way my old engine was noisier and that had cast pistons! . The new one is almost silent
Last edited by l70byb.; 08 April 2008 at 08:35 PM.
#154
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Spark Plugs
Last edited by smokingkills; 08 April 2008 at 08:05 PM.
#155
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another but with the breather pipe removed, this pipe was blocked mind you as the breather fitted never went in the pipe properly and caused it to close off and the circlip wasn't on it
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so the breather system was blocked totally? if so this would cause the breather system to pressurise and blow oil out anywhere it could i'e turbo ,oil seals, rings, anywhere! whu did that to the breathers?
#160
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they did everyting, it was whilst i checked my sensor for leaks,as i read you must do, i pulled the breather off but it snapped in half leaving the rubber part of the breaher in the pipe and i could see that it waa blocked where the clip was holding it on,i replaced his with another one which seemed better, the car has 2 breathers one here by the sensor and one for the heads,
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looking at your photo of the block and the cambelt covers yes you have the 2 breather holes but the tuner has blocked one off towards the middle where the block splits . Same as mine the other on my engine has a large rubber tube which fits over it then to the catch tank or breather filter. is that your engine with the silicon red hoses? did the tuning company fit them ? and do the clip up to tight?
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looking at your photo of the block and the cambelt covers yes you have the 2 breather holes but the tuner has blocked one off towards the middle where the block splits . Same as mine the other on my engine has a large rubber tube which fits over it then to the catch tank or breather filter. is that your engine with the silicon red hoses? did the tuning company fit them ? and do the clip up to tight?
#173
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3 thou is the measurement we use in engineering to be honest it's old terms these days . Basically not even a *** paper clearance between piston and bore. Well yes forged piston do make a noise on cold start up but it should'nt be that bad . very light tap If measured correctly . Put it this way my old engine was noisier and that had cast pistons! . The new one is almost silent
If you run a smaller clearance than recommended with Forged pistons,then you run the risk of the piston "picking up" on the bore and wrecking the piston and the bore.
The standard EJ257 pistons are Hyperthuretic and therefore need a small P/B clearance due to the fact they expand less because of the higher Silicone content used in the Alloy.
Thats why most Specialists bore to suit the Pistons and then hone to the correct Manufacturers spec for the Piston/Bore clearance.
Wiseco are also quite particular on the positioning of the Oil Control Rings due to the design of the Boxer Engine.
If the Insulation tape got into the oil gallerys and blocked a main bearing journal,it wouldnt take long to damage the mains/big ends/crank journals.
Its a crying shame after spending that much on modding the car.
Just my 2 pence worth.
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It shouldn’t cost that much and might well get you some answers. Especially if you paid on plastic
Good luck
#175
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Surely if the Piston Manufacturer states the Piston/Bore clearance should be 0.003" then that must be for the thermal expansion of the piston skirt in comparison to the expansion of the liner.
If you run a smaller clearance than recommended with Forged pistons,then you run the risk of the piston "picking up" on the bore and wrecking the piston and the bore.
The standard EJ257 pistons are Hyperthuretic and therefore need a small P/B clearance due to the fact they expand less because of the higher Silicone content used in the Alloy.
Thats why most Specialists bore to suit the Pistons and then hone to the correct Manufacturers spec for the Piston/Bore clearance.
Wiseco are also quite particular on the positioning of the Oil Control Rings due to the design of the Boxer Engine.
If the Insulation tape got into the oil gallerys and blocked a main bearing journal,it wouldnt take long to damage the mains/big ends/crank journals.
Its a crying shame after spending that much on modding the car.
Just my 2 pence worth.
If you run a smaller clearance than recommended with Forged pistons,then you run the risk of the piston "picking up" on the bore and wrecking the piston and the bore.
The standard EJ257 pistons are Hyperthuretic and therefore need a small P/B clearance due to the fact they expand less because of the higher Silicone content used in the Alloy.
Thats why most Specialists bore to suit the Pistons and then hone to the correct Manufacturers spec for the Piston/Bore clearance.
Wiseco are also quite particular on the positioning of the Oil Control Rings due to the design of the Boxer Engine.
If the Insulation tape got into the oil gallerys and blocked a main bearing journal,it wouldnt take long to damage the mains/big ends/crank journals.
Its a crying shame after spending that much on modding the car.
Just my 2 pence worth.
#178
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i use about a litre every 1000 miles and i use 10w60 edge stuff, never knew why it drank oil that much, and nothing was reported incorrect at service so i'm assumng the engine is just a oil drinker aswell as a petrol drinker.
#180
So, was there oil coming out from where the sensor was attatched to the block, before you put some insulation tape in? Or did u fit the defi guage by yourself after the engine build.
Also, your car seemed to be using way too much oil from the start anyway. I know forged engines are known to use oil sometimes, but not this much. Might aswell get a two stroke engine conversion if its gona be using that much oil.
I can just see it "Hi, I drive a 500bhp subaru lawnmower"
Some people's rebuilds use hardly any oil, guess it depends on the engine builder, no oil use......good engine builder, a lot of oil use..........
Either way, the company received 20k for you to be their customer, thats more than most peope earn in a year.....I think a free rebuild wouldnt put too much of a dent in their wallet......
Also, your car seemed to be using way too much oil from the start anyway. I know forged engines are known to use oil sometimes, but not this much. Might aswell get a two stroke engine conversion if its gona be using that much oil.
I can just see it "Hi, I drive a 500bhp subaru lawnmower"
Some people's rebuilds use hardly any oil, guess it depends on the engine builder, no oil use......good engine builder, a lot of oil use..........
Either way, the company received 20k for you to be their customer, thats more than most peope earn in a year.....I think a free rebuild wouldnt put too much of a dent in their wallet......