Compression test results

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Nov 4, 2013 | 01:36 PM

#16

JeepingDan

CF Veteran

Joined: Apr 2009

Posts: 18,786

Likes: 14

From: CT.

Year: 88

Model: Comanche (MJ)

Engine: 4.0 HO

Quote:

Originally Posted by 00exjay

I sure hope so. If this needs a motor I have to sell it and buy a honda. I dont want a honda.

In just about every case at my shop the engine was ok, the head gasket usually burns in between the cylinders causing a couple cylinders not to fire.

Nov 4, 2013 | 01:40 PM

#17

00exjay

Thread Starter

Seasoned Member

Joined: Jun 2012

Posts: 369

Likes: 0

Model: Cherokee

Quote:

Originally Posted by JeepingDan

In just about every case at my shop the engine was ok, the head gasket usually burns in between the cylinders causing a couple cylinders not to fire.

but if it blew the gasket wouldn't the test say 0 psi between 2 if the cylinders even if it is cold?

Nov 4, 2013 | 01:44 PM

#18

JeepingDan

CF Veteran

Joined: Apr 2009

Posts: 18,786

Likes: 14

From: CT.

Year: 88

Model: Comanche (MJ)

Engine: 4.0 HO

Quote:

Originally Posted by 00exjay

but if it blew the gasket wouldn't the test say 0 psi between 2 if the cylinders even if it is cold?

You still get something but a very inaccurate reading.

Nov 5, 2013 | 10:54 AM

#19

00exjay

Thread Starter

Seasoned Member

Joined: Jun 2012

Posts: 369

Likes: 0

Model: Cherokee

Well,i started it and let it warm up to about 200 than tested it again

#1_60
#2_85
#3_100
#4_40
#5_80
#6_165
I didnt bother doing a wet test. The jeep cooled down to about 160 from taking the plugs abd coil back out . When I started it it smoked from the pipe for like a minute I guess burning off all the oil I poured into it to do the wet test but there was light smoke coming from the oil cap when I took it off. I'm stumped