b20 head on a b18 block?
03-28-2007, 07:26 PM
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b20 head on a b18 block?
yeah sounds weird because it is, my friend bought a motor it was supposed to be an obd2 b18b1 we took the head off and put a new headgasket in it as well as arp head studs, we re-assembled and fired it up. before the engine was running long, it developed problems such as coolant in the combustion chamber. we took the head back off to get it resurfaced, we took some measurements and specs which come to find out match those of a b20. it has a b18 intake manifold and everything else which is what confused me. i'm not sure of where he bought the engine from but it was deff rigged...
so the question is will a b20 head work on a b18 block if so what headgasket should be purchased? i dont see this as its going to work but gotta ask!
so the question is will a b20 head work on a b18 block if so what headgasket should be purchased? i dont see this as its going to work but gotta ask!
03-28-2007, 07:31 PM
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Re: b20 head on a b18 block? (2wheelhunter)
The heads are identical. B18B and B20 head are completely interchangeable. Sounds to me that the head might need to be decked (like you mentioned), or you could have messed up the torque specs on the head bolts, or got the wrong headgasket.
Use the timing belt from the block. (i.e. B18B block, B18B belt)
Use the timing belt from the block. (i.e. B18B block, B18B belt)
03-28-2007, 07:33 PM
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Re: b20 head on a b18 block? (93eg2james)
i'm not the one who checked the specs, i beleive it was the machinest that said that the specs were different.. so he was wrong.. i know nothing about b20 blocks or heads
03-28-2007, 07:49 PM
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Re: b20 head on a b18 block? (93eg2james)
lol i dont know i wasnt there, he said that it was the spec of the b20 but if b18 and b20s are the same then that would be why
03-28-2007, 08:29 PM
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Very unlikely that you have a p8r head on your hands.
Read the stamp on the back though
all usdm b20 and b18 both use a p75 head - completely identical
Read the stamp on the back though
all usdm b20 and b18 both use a p75 head - completely identical
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03-30-2007, 05:16 AM
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Re: (pdiggitydogg)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pdiggitydogg »</TD></TR><TR><TD CLASS="quote">Very unlikely that you have a p8r head on your hands.
Read the stamp on the back though
all usdm b20 and b18 both use a p75 head - completely identical</TD></TR></TABLE>
Yes, very unlikely, but not impossible...
Read the stamp on the back though
all usdm b20 and b18 both use a p75 head - completely identical</TD></TR></TABLE>
Yes, very unlikely, but not impossible...
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