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12ht cylinder compression

Posted: Mon Dec 18, 2006 11:56 pm
by TimMQ
Ive organised a compression test on a 60 series im looking at buying.

Im sick of searching for no answer, so, Can someone please tell me the recommended cylinder pressure for a 12ht.

Appreciated
Tim

Posted: Thu Dec 28, 2006 6:49 pm
by Shadow
12HT Compression

Origonal Spec Compression
30.0 kg/cm^2, 427psi, 2942kpa

Minimum Compression
20.0 kg/cm^2, 284psi, 1961kpa

Max Difference between cylinders
2.0 kg/cm^2, 28psi, 196kpa

Get them to do both dry and wet compression tests, this will tell you wether its rings or other (valves, head gasket, crack/hole in piston)

Posted: Thu Dec 28, 2006 8:24 pm
by TimMQ
wish youd posted that info a week ago. I bought the car, they gave me the figures for the test but i have a feeling the coights didnt even do it.
fingers crossed all is well

cheers though

Tim

Posted: Thu Dec 28, 2006 8:28 pm
by Shadow
TimMQ wrote:wish youd posted that info a week ago. I bought the car, they gave me the figures for the test but i have a feeling the coights didnt even do it.
fingers crossed all is well

cheers though

Tim
sorry, been off the radar with work and all the christmas jazz.

If you have low compression it will almost definantly blow white smoke on startup idling while engine is cold.

Also, id be more than happy to send you a copy of the toyota engine and body manuals for the HJ60 on cd, engine manual covers 2H and 12HT. This is where i got the figures i posted from.

Posted: Thu Dec 28, 2006 9:41 pm
by TimMQ
Thatd be great, cheers mate.

i had the bloke at the dealer throw in a 3 year upgraded warranty. but they only contribute 2500 to engine repairs. out of curiousity whats a rebuild worth on these things.

have a good one

Tim

Posted: Thu Dec 28, 2006 11:58 pm
by Shadow
TimMQ wrote:Thatd be great, cheers mate.

i had the bloke at the dealer throw in a 3 year upgraded warranty. but they only contribute 2500 to engine repairs. out of curiousity whats a rebuild worth on these things.

have a good one

Tim
About $5500 for a full rebuild.

Posted: Fri Dec 29, 2006 10:51 am
by joel HJ60
What does it cost for a compression test?

Posted: Fri Dec 29, 2006 7:28 pm
by TimMQ
They hit me 200 :roll: i should have had someone else do it but i didnt have the time to fuck around