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G-unit
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1,132 Posts
Discussion Starter #1
I am currently doing my research to start a build up of one of the spare SRs I have sitting around as the one now residing in the engine bay of My B-13 seems to enjoy consuming oil at a rate of 1qt per 1500 miles I am probably going to try to replace vavle guide seals in an attempt to fix this problem, but I just don't see how they could cause this much oil consumption. I have Checked compression 155-165psi for all cylinders and replaced pcv and such to no avail. So I am about to attempt build up of a spare motor my questions are as follows.
1.After I assemble the head how do I determine what size shims to use on rockers?
2.Can I get away with just honing it or do I need to bore out the cylinders.
3.Any other tips or suggestion specific to SR20
 

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Not on fire... yet
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591 Posts
As for the valve train we are both doing the same thing, I will find out about the rocker shims.... As for honing> its sleeve so im not sure.... I 'll find out though...
Email if you get a chance....

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93 NX2K
some stuff and a DET
"project street mod?"
1988 BMW M3 w/ a few toys
 

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El Chingon
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892 Posts
A compression check won't tell you if you have bad valve guide seals. What it well point you at is the condition of the rings. Do a leak down test and post your results of that. That can help us pin-point the cause a little better. As for question number one, let's just say I hope you know how to use your measuring devices
Get a FSM. That should be your first step before you even start tearing down. Study it, learn it. It will tell you all about shim selection in there. Question two: check cylinder taper and out of round and compare that to the specs in the FSM. Of course if you have scratched or damaged cylinder walls, definitely bore it, but send it to JWT since they're the only ones (that I know of) who have a Torque Plate for the SR20. My biggest tip, get the FSM and learn it and take your time. If it's a spare motor, you probably in no hurry, right? Just take your time and things will come out better.

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David
'98 Super Black SE w/stuff
 

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El Chingon
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892 Posts
Well, looking back at my last post, I didn't really answer question 2 very well, did I? What I would do, like I said, is measure everything (twice!) and determine (by using the FSM) whether or not the cylinder is in spec. and if it is, then just honing it will do. If not, you'll probably need to bore it. But, use JWT. Oh, and did I mention you should get a FSM


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David
'98 Super Black SE w/stuff
 
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