Compression Problem After Rebuild

[SECURITY]

this has really got me puzzled...

we went to start the car today after my rebuild when #1 wasnt firing. it wasnt showing compression and there seems to be no compression leak through the rings, or through the head..

my only option now is to run the car and hope the lifters bleed themselves properly as its up on ramps now. then get a leak down test.

if anyone has any idea what it could be PLEASE let me know.. we installed new rings, head gasket and got the head machined.

[ylwgtr2]

what model engine is it?

[SECURITY]

series 1 rb25det

[MerlinTheHapyPig]

who did the rebuild? take it back and ask them...

[Scooby]

who did the rebuild? take it back and ask them...

I agree. Heads don't 'bleed themselves' - there is either compression or not. The fact that there appears to be no leakage is intriguing though.

[SECURITY]

i did the rebuild.. its got me completley confused.

sorry i meant lifters... fixed first post.

[Al]

When you say "got the head machined" what exactly was done and by whome?

[SECURITY]

the head surface done by duncan foster engineering in sydney. just added that to rule out the head gasket leaking.

[StockyMcStock]

sounds a lot like a rooted/unbled lifter to me. if you're keen you could whip the cams out and pull the 4 lifters involved, clean them and put them back in. or just run it and hope they bleed themselves. it won't damage anything really if you do it the easy way.

[SECURITY]

i'll give that a go tomorrow mate. thanks for that.

[Guilt-Toy]

i'll give that a go tomorrow mate. thanks for that.

You can borrow 4 spare lifters that i have from a spare head for a TEST if you like. As long as you promise to give them back when your finished (same ones)

pm me if you need em - only thing is they are in Newcastle but this could help - thought i would offer.

[wrxhoon]

Did Duncan Foster assemble the cyl head or did you ?

If you did did you lupp the lifters out? If yes how did you store them ?

How is the compression on all the other cylinders? Have you had it checked?

[SECURITY]

thanks mate, i'll let you know.. chances are if the lifters are stuffed i'd get the head serviced.

[SECURITY]

i assembled it, i used a magnet and lifted them out.

they were stored in box.

all other cylinders are fine.

[rb26s13]

in a box of oil is just in a box? always best to store hydrolic lifters in oil when not in use

[SECURITY]

just in a box.. i blew them out thoroughly before installing them though.

[Craved]

and the best way for him to clean the lifters would be???

metho and fuel ??? or parts washer mix ?

[BezerkR32]

Pull them back out and let them soak in tub of light engine oil overnight. might take half an hour to bleed up at 1500 rpm after instalation. i get this all the time when doing engines. dont stress to much.

just in a box.. i blew them out thoroughly before installing them though.

[wrxhoon]

Are all the springs in? If you are going to clean the lifters you have to bleed them before instalation, if you are not going to clean them you put them in and oil can upright .

Is compression zero in number 1? Whats the compression on the other cylinders? Was is making a racket when you first started it? is it quiet now ?

So you pulled the valves out and relapped them , correct?

Did you bend a valve ? Did you put the valves back in the same spot as they were before? You have to tell us a lot more detail if you want a possible sollution .

You are not having much luck there Joe, is this number 3 rebuilt atempt?

By the way i dont think your problem is a lifter.

Edited June 13, 2006 by wrxhoon

[James_03]

Just start the engine as normal and let it idle, it just needs to gain oil pressure. The lifters will bleed themselves as soon as the oil pressure is good.