Very low compression

cre · 04-30-2008, 06:12 PM

Whoa, 50psi on #1 and only 70 wet? So have you replaced the rings or not? Is your dipstick getting blown out yet?

supramacist · 04-30-2008, 08:00 PM

Quote:

Originally Posted by cre

Whoa, 50psi on #1 and only 70 wet? So have you replaced the rings or not? Is your dipstick getting blown out yet?

Pardon the pun.

I'd lap that block at home. If that's the worst damage you have.
Mine was much much worse.

paulmicin · 04-30-2008, 11:09 PM

I didn't have a problem lining up the head i just put it on and dropped the bolts in the holes.
the block is smooth i dont think thats the problem. i havent changed the rings. the seller told me it was a low mileage engine that he swapped in so i doubt its the rings.i also noticed white stuff on the oil cap but that could just be this grease that the machinist put on the lobes and lifters when i got the head back. i have the pcv rerouted to a catch can and then to the atmosphere and theres white smoke coming out of the pcv lines.how can there be smoke. there wasnt any before. can all this be explained by a badly resurfaced head?

cre · 04-30-2008, 11:22 PM

Sigh... I'm sure it was a low mile JDM engine.... and God only knows how hard it was beat on before it came to the states and then how long it sat in a shipyard with a gentle mist of surface rust slowly leaving little pock marks of love everywhere important.

Seriously... how many JDM engines have you seen? Half of them were driven to the point that they could no longer pass inspection (often without oil) and then simply discarded for something newer.

White smoke? Does it smell sweet? White grease? Sorry, lithium grease isn't really used as an assembly lube... you're probably looking at an oiling system full of coolant. Have you checked the radiator for oil?

You know, the PCV system is actually VERY beneficial to older engines. It actually helps prevent blow-by. It creates suction which evacuates the blow-by gases which occur in all engines. get the breather off of it and run it to a vacuum source. If you don't like it running to the TB then run it to the exhaust. And if you're going to keep it running to atmosphere the catch can isn't going to do much more than sit there looking pretty.... well, in your case it's probably full of coolant and unburned fuel.

A light textured swirl pattern on the head and block deck is actually desireable if you're running an OEM type graphite HG. If you're running a steel HG you want smooth as glass and straight as hell. You need to specify what your doing or they'll assume it's a rebuild per specs. With the texture you should just barely be able to feel it with your fingernail.

supramacist · 05-01-2008, 12:25 AM

Most shops will give the head a light soda blast to make it all smooth and like minded.

cre · 05-01-2008, 12:54 AM

Quote:

Originally Posted by supramacist

Most shops will give the head a light soda blast to make it all smooth and like minded.

Are you serious? New one to me. I really can't imagine how that would serve any more purpose than cleaning off the rest of whatever carbon was still stuck to the valves so you think you're getting your money's worth.

BTW, you seen that they now make equipment for blasting with pulverized dry ice? No mess! Oh, and it's cold, so it's the safest thing to use on sheet metal!

supramacist · 05-01-2008, 01:20 AM

Well in this neck of the woods they do and that's because the old napa parts store is the village machine chop main.

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04-30-2008, 06:12 PM	#1
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Whoa, 50psi on #1 and only 70 wet? So have you replaced the rings or not? Is your dipstick getting blown out yet?

04-30-2008, 11:09 PM	#3
paulmicin 3" Exhaust Join Date: Oct 2007 Location: Norwalk, Ca Posts: 52	I didn't have a problem lining up the head i just put it on and dropped the bolts in the holes. the block is smooth i dont think thats the problem. i havent changed the rings. the seller told me it was a low mileage engine that he swapped in so i doubt its the rings.i also noticed white stuff on the oil cap but that could just be this grease that the machinist put on the lobes and lifters when i got the head back. i have the pcv rerouted to a catch can and then to the atmosphere and theres white smoke coming out of the pcv lines.how can there be smoke. there wasnt any before. can all this be explained by a badly resurfaced head?

04-30-2008, 11:22 PM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Sigh... I'm sure it was a low mile JDM engine.... and God only knows how hard it was beat on before it came to the states and then how long it sat in a shipyard with a gentle mist of surface rust slowly leaving little pock marks of love everywhere important. Seriously... how many JDM engines have you seen? Half of them were driven to the point that they could no longer pass inspection (often without oil) and then simply discarded for something newer. White smoke? Does it smell sweet? White grease? Sorry, lithium grease isn't really used as an assembly lube... you're probably looking at an oiling system full of coolant. Have you checked the radiator for oil? You know, the PCV system is actually VERY beneficial to older engines. It actually helps prevent blow-by. It creates suction which evacuates the blow-by gases which occur in all engines. get the breather off of it and run it to a vacuum source. If you don't like it running to the TB then run it to the exhaust. And if you're going to keep it running to atmosphere the catch can isn't going to do much more than sit there looking pretty.... well, in your case it's probably full of coolant and unburned fuel. A light textured swirl pattern on the head and block deck is actually desireable if you're running an OEM type graphite HG. If you're running a steel HG you want smooth as glass and straight as hell. You need to specify what your doing or they'll assume it's a rebuild per specs. With the texture you should just barely be able to feel it with your fingernail.

05-01-2008, 12:25 AM	#5
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	Most shops will give the head a light soda blast to make it all smooth and like minded.

05-01-2008, 01:20 AM	#7
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	Well in this neck of the woods they do and that's because the old napa parts store is the village machine chop main.