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Have I Stuffed My Engine?

Abo Bob

By Abo Bob,
in Engines & Forced Induction

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Abo Bob Grand Master

Abo Bob

Posted
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I thought the RB26 rods were the same (but thicker) but the RB26 crank was what you needed to stroke it? Also need RB26 pistons with that but that doesn't matter.

Rb25 will do the job I'm after so although I'd like the RB30 I don't want the hassle and I'm short of cash for issues so I'm sticking to something fairly safe. Might get 250rwkw with a rebuilt RB25 and no other mods.

Wont be many other tiptronic R34's out there to compete with that.

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Cubes Grand Master

Cubes

Posted
Posted (edited)

Sounds good Bob.

Dropping the comp ratio with a set of cheap cast pistons?

250rwkw is a walk in the park with a decent comp ratio.

9:1 is too highly strung for our fuel really, it can be done with long term reliability but one has to be carefull.

Edited by Cubes
E_Lu-SHuN Mentor

E_Lu-SHuN

Posted
Posted

since no one reply in my thread ill post it here :O

i think i got a similar problem to adams but my catch can is full atmo. I did the compression test and it seems all fine... the readings were ranging from 150 to 160. So what else could be the problem?...btw i noticed water in my overfilled catch can (milky colour) thats bad!..emptied it...but i know my catch can will fill up quickly again...any ideas?

ed Grand Master

ed

Posted
Posted
since no one reply in my thread ill post it here :P

i think i got a similar problem to adams but my catch can is full atmo. I did the compression test and it seems all fine... the readings were ranging from 150 to 160. So what else could be the problem?...btw i noticed water in my overfilled catch can (milky colour) thats bad!..emptied it...but i know my catch can will fill up quickly again...any ideas?

take it to a mechanic.

GunMetalR33 Mentor

GunMetalR33

Posted
Posted
since no one reply in my thread ill post it here :D

i think i got a similar problem to adams but my catch can is full atmo. I did the compression test and it seems all fine... the readings were ranging from 150 to 160. So what else could be the problem?...btw i noticed water in my overfilled catch can (milky colour) thats bad!..emptied it...but i know my catch can will fill up quickly again...any ideas?

If there is water in your catch can it would have to be a head gasket right...

anyone :P

wrxhoon Grand Master

wrxhoon

Posted
Posted
since no one reply in my thread ill post it here :P

i think i got a similar problem to adams but my catch can is full atmo. I did the compression test and it seems all fine... the readings were ranging from 150 to 160. So what else could be the problem?...btw i noticed water in my overfilled catch can (milky colour) thats bad!..emptied it...but i know my catch can will fill up quickly again...any ideas?

If the catch can can just fills with water , you will find the oiul in the engine would be milky too . If thats the case it could be a leaking headgasket and or cracked head/block , h/gasket the most likely .

If your catch can fills with oil as well then the bottom end , rings most probably are worn .

E_Lu-SHuN Mentor

E_Lu-SHuN

Posted
Posted

I checked the oil cap after driving it...and NO milky look on the cap

YEh the catch can is filled with oil and water.... i noticed that around my bottom block...theres oil ...im not sure where its leaking from...i guess the head gasket

wrxhoon Grand Master

wrxhoon

Posted
Posted
I checked the oil cap after driving it...and NO milky look on the cap

YEh the catch can is filled with oil and water.... i noticed that around my bottom block...theres oil ...im not sure where its leaking from...i guess the head gasket

By the sound of it the oil leak is the least of your problem .

Its normal to get some condensation in the oil catch can, but if it fills up with normal street driving your engine is not healthy . Empty it out and see how long it takes to fill up , how much does it hold ? how much water in it ? How much oil does the engine use ? is it fairly stock ? how much boost ? Stock pistons or forged ?

wrxhoon Grand Master

wrxhoon

Posted
Posted

Adam ,

If you deside to pull your engine out and rebuilt it yourself let me know , as i have machine shop contacts to get the bore out , crank and cil head done .

All the above around $500 , if you want prices p.m. and i'll find out for you .

E_Lu-SHuN Mentor

E_Lu-SHuN

Posted
Posted
By the sound of it the oil leak is the least of your problem .

Its normal to get some condensation in the oil catch can, but if it fills up with normal street driving your engine is not healthy . Empty it out and see how long it takes to fill up , how much does it hold ? how much water in it ? How much oil does the engine use ? is it fairly stock ? how much boost ? Stock pistons or forged ?

YEh you could say it fills upwith normal street driving. I emptied it like 3 days ago, so ill see how fast it will fill up...Its a Greddy look alike...the square rectangal one. there was abit of watr in it. I got a oil cooler and relocation kit for it...soo almost 5L of oil. Its not stock, Internal wise it is....its running a gt30 with external gate., Boost im running stock. Anymore info that may be helpful for a solution?

wrxhoon Grand Master

wrxhoon

Posted
Posted
YEh you could say it fills upwith normal street driving. I emptied it like 3 days ago, so ill see how fast it will fill up...Its a Greddy look alike...the square rectangal one. there was abit of watr in it. I got a oil cooler and relocation kit for it...soo almost 5L of oil. Its not stock, Internal wise it is....its running a gt30 with external gate., Boost im running stock. Anymore info that may be helpful for a solution?

How much oil does the catch can hold ? not the engine . I'm trying to determine how much oil goes in the catch can and how long it takes to fill up ( as in how many k's ) . How much oil does your engine use ? as in how long before you have to top it up ?if it uses say 1 lt or more per 1000 k's , the only solution i can think of is a rebuild !! If your engine is anywhere near healthy and you run stock boost you should never have to empty the catch can . You will get very little oil in there if engine is still good .

If you want to know for sure a leak-down and compression test will show the condition of your engine ...

E_Lu-SHuN Mentor

E_Lu-SHuN

Posted
Posted

Yeh i said it was a GREDDY LOOK ALIKE CATCH CAN....soo it doesnt hold as much....say 600ml

i have done the compression test and all cyclinders were ranging from 150 to 160.

Is there any diff from a leak down test?...i was told it was the same...

wrxhoon Grand Master

wrxhoon

Posted
Posted

Not the same at all , you can have good compression and worn piston rings too. 150-160 a bit on the low side , when did you do the comp test ? after you realised the catch can filling up or before ?

E_Lu-SHuN Mentor

E_Lu-SHuN

Posted
Posted

i did the comp test after i noticed it was filling. I was more concerned when my car blew white smoke for a while...but i think that was due to the catch can being overfilled..

So can a leak down test find out that a comp cant?

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