Can a cracked 0331 pass block tester?
Thread Starter
Member
Joined: Mar 2011
Posts: 194
Likes: 0
From: Carmichael, CA
Year: 2001
Model: Cherokee
Engine: 4.0
I bought block tester from auto zone and put it on my radiator did the mumbo jumbo and for over 5 minutes with engine running and hot...would a cracked head pass this test?
CF Veteran




Joined: Nov 2010
Posts: 5,840
Likes: 117
From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
I've seen the block test both pass and fail with a cracked 0331 head.
I'd recommend a cylinder leakdown test as a primary test for a suspected cracked head.
I'd recommend a cylinder leakdown test as a primary test for a suspected cracked head.
Seasoned Member
Joined: Jul 2012
Posts: 484
Likes: 3
From: New Milford, CT
Year: 1999
Model: Cherokee
Engine: 4.0
I just had my 0630 head checked for cracks and mine was cracked.
I did the combustion gas test as well with the radiator and what not and it passed.
I think that test just checks for a blown headgasket.
I did the combustion gas test as well with the radiator and what not and it passed.
I think that test just checks for a blown headgasket.
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