Low compression on No.4--Ideas ???

PukkaSilvia · #1 27-03-2008, 06:52

no idea?

how about the guy who started the thread off asking the question

i would say unless it improves from driving it a bit more since its been worked on your best off taking the head off Northerner, although im sure you know that already.

northerner · #2 27-03-2008, 12:33

thanks for that. I'm just sounding out ideas before I go with the renewing the HG. I kinda hoped not to do that as its only done 45k but sounds like its a must

30psi · #3 27-03-2008, 14:41

Do a homebrew leak down test before ripping apart the engine.

northerner · #4 28-03-2008, 07:18

Quote:

Originally Posted by 30psi

Do a homebrew leak down test before ripping apart the engine.

H'mm you've got me on that one?

30psi · #5 28-03-2008, 08:08

Get an old spark plug, hack it and drill it out so you can get something resembling a hose on it, or use an old compression tester and hack it.

You then only need to apply actually low pressure to identify a leak. I used an old pressurized gardening water can thing for this.

Then use a foot long petrol pipe, shove it in the inlet manifold, oil filler, or exhaust/turbo to see where you can hear a hiss.

If it does turn out to be rings, or a damaged piston (eg detonation) then I wouldn't bother attempting a repair. Be easier to find another engine