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Low Compression - Bad Engine?

23K views 5 replies 6 participants last post by  bog  
gota love no profile and no motor spec, nice. (not) 2000 year, I4 2L DOHC motor , wild guess?
weve posted like 10,000 times how to do a compression test... sigh.
warm to hot , W.O.T , all sparks out.

#2 is DOA. I dont think oil will save it, YMMV

x2 above, and do a leakdown. using a leakdown tester if you need more proof of DOA.
i dont.

you could do a RAD leak down test and see if the gasket is failing (or worse)

at this point where the pressure is going is unknown.
me i follow the book that came with my eng. cyl. leak down tester. ( can send Amazon link to same)


1: shop air conn. with LD tool or welded on nipple to a shelled outspark plug. (omg , free tools almost,same too for valve seal swap head on.)
2: TDC #1 cyl ,exactly so i can bump.
3: now listen to Intake plenum ( (rubber hose to ear) all intake valve leaks. (manif. off ,is better , surely)?
4: listen to all exh ports, ah #2 is way bad. (manif . tied back)?
5: listen to oil filler cap hole and dip stick tube hole , hare rings leak.?

that leak test tool is amazing.
you could take of water pump and do that to the jackets. but most don't. (but i do, because pressure testing a block is very expensive and labor max)
it's amazing what you can do with $2 nipple and shop air.

in 87' , Tom Wilson taught me that, Thanks TOM !