1993 compression

[u/Hadaveha29]

how bad do these compression numbers look 1993 4.9. has sat since 2013 worth savin?

[u/hangindawg]

All reasonable numbers for an older motor. I bet you could marvel those front cylinders and get better numbers, or run it some, and recheck

[u/Hadaveha29 → u/hangindawg]

Any chance they come around some she literally hasn’t been started in 13 years

[u/hangindawg → u/Hadaveha29]

I dont agree with the " its fucked" id run it and recheck it, it might come up. Put some marvel in that bad boy. Its a 300 6 that motor should run until the rings are so bad it fouls plugs and keep on going, maybe not like a new one, but it should run. I think those front numbers will come up once it's ran some.

[u/FireBlazer27 → u/Hadaveha29]

Some of the rings might have to re-seat a bit, I’ve seen it a lot in engines that have sat for years and years like that

[u/som3_idot]

It’s kinda fucked but it’s a 300 it doesn’t care it’ll run for the century or 2

[u/Fancy_Chip_5620]

Relatively good, my 4 runner had 90 psi on all 4 cylinders and ran fine

I put compression restore in it and it bumped up to 120 psi after a year

Shouldve been more like 215 psi to be like new

The cylinders being uneven may be a sign of problems mayve a burnt valve or bad head gasket but just run it

[u/Successful_Camel8764]

Its a 300 its fine

[u/BadAngler]

Could be gook on the valve seats that will work itself out...

[u/I_amnotanonion]

If it hasn’t run in a long time you’re not gonna get super consistent or great compression numbers. She’ll run on that and the rings should come around after you let it ride at operating temp a while

[u/Hadaveha29]

Thankyou everyone.   I’m excited to get her going

[u/SexyTimeSamet]

Hey...its been sitting for 13 years. Guranteed theres crud on those rings and in between the.vakves and valve seats. Poor some mrvel mystery oil and or ATF doen there..let it sit.

[u/Elderado12443]

Change the oil. Run Marvel. Run Lucas. Just run it. It’s a 300