Engine Trouble

[mini&therat]

So I have a 1983 720 KC, 2.4, 4X4 with engine troubles. It sounds like valve clatter but those have been checked, fixed and are fine. The cam is good to go. Using a scope, it sounds like the #3 piston is the culprit. The clatter can't be heard at idle but is loud under increasing load. Compression is low but not horrible (110-120ish).

 

Does anyone know what this could be?

 

I was thinking of either trying to fix it or replacing it.

 

If I have to replace, does anyone have an engine in the Puget Sound area for sale or know of a shop that does rebuilds?

 

I will try to post pics of it soon.

 

I'm also looking for a stock, front brush guard and stock seats.

 

Thanks,

 

Alain

[datzenmike]

Well hard to say.

 

Check timing... about 3-5 degrees BTDC.

Confirm that both intake and exhaust side coils are firing.

Pull all plugs and compare to the #3 cylinder.

 

 

Won't cost anything.

[ggzilla]

110-120 lbs is horrible. Do a wet compression test to double-check it.

 

I'm with Mike, the Z24 8-plug heads can make noise if the plug is firing wrong.

[mini&therat]

Thanks for the tips. I will check the timing, etc. this weekend and keep you all posted.

 

Alain

[mini&therat]

So it doesn't look like it's the timing. I'm going to drive it until I find a good replacement or a reasonable rebuild shop.

 

Any suggestions on a good rebuild shop in the Everett area? I can do a lot of the R&R myself just not the internal rebuild stuff.

 

Also looking for the following:

 

--- a pair of black/gray stock seats ---

--- Black/gray door panels ---

--- Stock 4x4 gas tank ---

 

Thank you all

 

Bad pics of truck