Topic: Engine ticking noise????

[Dylan]

Maybe an exhaust leak.  Check to see if the rear bolt on the exhaust manifold is broken.

X2
My bet is exhaust leak.

[haulincats]

Finally had time to work on the Jeep.
Pulled the valve cover, everything looked good.
Dropped the oil pan, found part of the piston
skirt from # 2 cylinder broken off and in the bottom
of the pan. It doesn't look like it hurt the
cylinder.
So I think I'm gonna try and find another 2.5
to put in and then rebuild this one.
Your thoughts??
Thanks,
Vance

[sharpxmen]

Finally had time to work on the Jeep.
Pulled the valve cover, everything looked good.
Dropped the oil pan, found part of the piston
skirt from # 2 cylinder broken off and in the bottom
of the pan. It doesn't look like it hurt the
cylinder.
So I think I'm gonna try and find another 2.5
to put in and then rebuild this one.
Your thoughts??
Thanks,
Vance

imo:
since you already pulled the oil pan you might as well take the cyl head off and see what's the damage - you can get a used piston to get you by for a while and then rebuild the other engine you're getting - that way you don't have to pull the block in and out twice. all that in case the cyl is not hurt (like you said). once you have the cyl head out you can also check it to see if it's flat, if it isn't then getting the other engine installed first would be better i think.

[Sine Deviance]

Your thoughts??
Thanks,
Vance

So, your 2.5L is pretty much toast, eh? That's a shitty situation, sorry to hear it. If it were me and I had the resources I'd upgrade and go to a small V8.

[dwtaylorpdx]

Ok i gotta pug it once then I'm going to stay out of it...

5w30 is too thin for the stock 2.5 liter. The engine main bearings and
rod bearings have too much clearance for a 5w30. In the manual
I don't think they recommend an oil that thin until like -10 F.

According to the guy that built my engine the stock clearance is right
for 10w40 or 20w50 in our normal Oregon weather, but that if I wanted to run the
new 0 or 5 weight oils He would tighten the clearances for it. He also had
doubts the stock oil pump was going to deliver without a bump in pressure with
the thinner oil. But we did a higher pressure pump so I'd have better low
rpm pressure and so far its worked great.. I had him set me up for 20w50 and
I'm now running 35lbs at idle hot ant 65 at cruise.

Dave

[haulincats]

imo:
since you already pulled the oil pan you might as well take the cyl head off and see what's the damage - you can get a used piston to get you by for a while and then rebuild the other engine you're getting - that way you don't have to pull the block in and out twice. all that in case the cyl is not hurt (like you said). once you have the cyl head out you can also check it to see if it's flat, if it isn't then getting the other engine installed first would be better i think.

I checked the compression before I pulled the pan,
#1- 145, #2- 145, #3- 155, # 4- 165
Which I thought was pretty good now that I see the damage to the
piston. That also makes me think the # 2 cylinder might be ok.
The engine I'm getting is "suppose" to have been rebuilt,
The guy I'm buying it from bought the Jeep 2 years ago and thats what the
previous owner told him. So I think I'm going to put that one in
and take my time (and as I get the money)  and rebuild mine.
What are other thoughts on the 5 w 30 oil?
I live in northern Michigan, in the winter its 0 to 20 degrees almost
every morning.
Thanks,
Vance 

[sharpxmen]

I checked the compression before I pulled the pan,
#1- 145, #2- 145, #3- 155, # 4- 165
Which I thought was pretty good now that I see the damage to the
piston. That also makes me think the # 2 cylinder might be ok.
The engine I'm getting is "suppose" to have been rebuilt,
The guy I'm buying it from bought the Jeep 2 years ago and thats what the
previous owner told him. So I think I'm going to put that one in
and take my time (and as I get the money)  and rebuild mine.
What are other thoughts on the 5 w 30 oil?
I live in northern Michigan, in the winter its 0 to 20 degrees almost
every morning.
Thanks,
Vance 

i use 10w30 full synthetic

[haulincats]

i use 10w30 full synthetic

What are your winter temps like?
What kind of synthetic and do you
use it year around?
Thanks,
Vance

[sharpxmen]

What are your winter temps like?
What kind of synthetic and do you
use it year around?
Thanks,
Vance

Mobil 1
year round
temps from 10F in the winter to about 90F in the summer.

[FourbangerYJ]

Mobil 1
year round
temps from 10F in the winter to about 90F in the summer.

X2...well except we don't get that cold and we get warmer in the summer. But when I lived in Denver that's what I ran. It could be -0 to 100+.