madfie

Ok I have the broken guides and have the front end kit. The motor has 200,000 miles, 22re, 86 runner. Compression check shows 165, 170, 150, 150 respectively.Should I just do the timing chain and front end kit or should I go deeper. I would like to build another engine outside and bump up the hp a little bit but I would like to drive while I'm doing it. Is there too much of a variance between these cylinders or would i be ok.
Thanks

By the way this was done on a cold engine

ditypup

They are within around 10% of each other. Could drive it a while longer. Do another compression check this time squirt some oil in through the spark plug hole and then do the check and note if the compression increases for the lower cylinders. If it does then it indicates worn rings. If it doesn't then it indicates valve or head gasket problems. If you determine it is head problems then you could pull the head and fix them.
The blocks on these trucks are pretty durable and have a long life span. But 200K is a point that most consider it's time to refresh everything.
There is a history of head gasket failures. But yours has 200K so ......


I did a timing chain replace on one of mine at 140K or so, and cleaned the crap out of the oil pan and I am still driving it almost daily. It has close to 185K on it now. Had a shop replace the clutch as I wasn't in the mood to do it at the time, and he's a Toyota Certified mechanic. He said mine would need to have some new bearings in the not too distant future. But then there are people that have gone 300K without doing a major overhaul. So its a tough call and really up to what you want to do and what you are able to do. If you can live without the truck for a bit you could tear it down now and if the bores aren't too bad maybe just hone and fresh bearings and rings. Or you could opt for 0.50mm over and build it up that way.


Just my opinion.

ditypup

A warm compression test might yield better readings. But the cold test tells most about static ring sealing.

BTW you live in Las Vegas - what do you mean "cold" compression test. LOL

87yo_ta

Just installed my second timing kit on my daily driver at 300k miles. So far so good. I'd build the replacement motor while I drove the original.