Low compression on 1HZ (2 Viewers)

[tantor]

First post.

Recently inherited my old man's 1996 HZJ75 troopy. It was in a bit of disrepair when I got it, but I fixed a few things up and took it to the mechanic and asked for a compression test. All cylinders are at 300-320 psi. Manual says this is well below limit (384 psi?), mechanic says "about the limit for what we would call a ‘healthy’ engine".

So, is 300 psi on the verge of dying or just being unhealthy? And is the best path forward to get a engine rebuild and the cylinders rehoned?

Cheers for any advice.

 

[Rigster]

In my experience, not all shops are the same... Not to throw shade on the shop you are going to, but did they do a bore scope? Or a top down leak test? Is there blowby if you remove the oil filler cap? This could be just be a head refresh job, and not necessarily a complete engine rebuild. If so, I would still do the BEB's while the head is being redone.

Best advice would be to decide if you love this truck, and are going to keep it, or will it be a burden you are hanging onto for sentimental reasons?

If you love it, prepare for a complete engine overhaul and be pleasantly surprised if it is just a head rebuild. It also makes a huge difference if you are going to do the work yourself, or pay a shop to do it. But more information is probably the way to go for now to ascertain what is necessary. Whatever your decision, I wish you all the best in this endeavor!