No compression at no 4 cylinder.
Posted
#764989
(In Topic #92176)
Settling In
No compression at no 4 cylinder.
Checked the compression - no.1 - 150ish, no.2 - 150ish, no.3 - 150ish, no.4 - 0. Double
Any ideas on what could cause this? I've searched the forum and found alot points to valve clearance but Ive got hydraulic tappets and was under the impression they are self adjusting?
My mate mentioned a valve might not be seated properly, can anyone suggest an easy way of checking this or do I have to take the head off again?
When I turn the key and have the compression tester in no.4 spark plug it does sound completely different from testing the other 3, but I guess it would anyway if there is no compression…
Please help! Any advice is greatly appreaciated! :mrgreen:
Posted
Newbie
If its not broke....I will break it
Posted
Local Hero
You could take it to a garage and ask them to do a cylinder leakdown test, this will show where the cylinder is leaking. It will be blowing into either: inlet manifold (inlet valve), exhaust (exhaust valve), cooling system (head gasket), or oil system (valve stem seals or rings). Or to outside the engine.
Posted
Old Timer
Posted
Settling In
I'm gonna get the head skimmed but don't know what to do about the valve. Is there any way of making it smoother cos the guide it sits in looks like it's part of the head?:dontknow: Or could the valve just be catching on the stem seal instead? Im gonna replace the seals (again lol!) on both valves to be safe anyway…
Posted
Local Hero
There are too many online users to list.