piston rings

[ZOMG.SR20]

to put new rings in a 93 SR20DET RWD what else do to i need besides HG and timing chain

[CSUPUEBLOTIM]

Whats the reason for needing new rings? There is usually a little more overhaul required to the the cylinder walls when replacing rings.

[ZOMG.SR20]

compression shows up good on three cylinders but bad on one the engine turns and turns gets fuel and spark and wont start but im more accustommed to the KA than the SR so any help from anyone would be helpful

[sandersb]

Are you sure it's rings?Have you checked valves and valve seats?Did you try pouring a bit of oil in the one cylinder and retesting compression?

If it was bad rings, the engine would still start with spark and fuel

[Justin35ll]

You would need more then that. If you were to replace rings you would have to do rod bearings as well as valve cover gasket, etc. But how bad is the one cylinder? It should still fire if one is bad, sounds like something else

[supreamS14]

You could replace just the rings and HG but you should hone the cylinder walls. While you have the pistons and rods out, you might as well replace the rod bearings.

If you have the hole motor apart, it would make sense to replace all the bearings.

But like others have said, it should still start. I broke a piston bad 2 times and it would still start.

If your valves are not shimmed properly you would loose compression as well. Just thought I throw that out there. Add in a cap of oil and re-do the comp. test.

[ZOMG.SR20]

the comp test was 150 50 60 40 psi and by oil which oil do you mean also the motor is still in not taking

[240life]

Thats a huge difference, I don't think oil will help. I would pull your head to inspect for damage....I suspect your going to need a rebuild on your head or block.

[ZOMG.SR20]

thats fine if i do rebuild im goin big and boreing it out and doing everthing right (may be, may be strokin to the SR22DET)

Cams, new gaskets, timing chain,bearings mostly all OEM except for some stronger aftermarket parts
Modified by redneck90m at 10:31 PM 1/15/2009

[240life]

thats fine if i do rebuild im goin big and boreing it out and doing everthing right (may be, may be strokin to the SR22DET)

Cams, new gaskets, timing chain,bearings mostly all OEM except for some stronger aftermarket parts

Modified by redneck90m at 10:31 PM 1/15/2009

The 2.2 stroker kit is nice, but can be very expensive, plus resleeving is not to be taken lightly. I considered it, but the cost was too much good luck with your engine, let us know what it was when you figure it out.

[ZOMG.SR20]

my first step is too tare apart the top end and see whats up the go from there

[240life]

Before you pull your head be sure to do a leakdown test first

[ZOMG.SR20]

please enlighten me to this test

[CSUPUEBLOTIM]

It hooks up like a compression test, but it uses compressed air to test how much ring blow by you have. Also if you can hear air blowing through the head then it is a good way to tell you if its in the block or head sometimes also.

[Justin35ll]

If you do a leak down make sure you unscrew oil and radiator cap to let air escape where it needs too and you can hear and see it better. for air bubbles

But those compression numbers were pretty bad just make sure to keep everything in order when taking apart. I bagged and labeled my pieces and bolts etc. Also make sure to take things off in the correct sequence and torque back on correctly. The fsm helped me find out specs when doing my engine

[ZOMG.SR20]

where can i find the FSM for the SR?

[masterdisaster]

ur asking about what's a leakdown test.. what oil do you put to boost the values of a compression test..

r u sure you know what you're doing by openning this engine up?

i'm sorry if you do .. but it doesn't seem that way

[ZOMG.SR20]

ive rebuilt motors before and taken apart heads and put them all back together but ive never heard of a leakdown test or putting oil in the piston for a compression test

[masterdisaster]

i've even put diesel to clean out the rings overnight add some oil the next day ( cuz diesel dries up after a while)

what esle.. ATF tranni fluid in the engine b4 an oil change.. ATF fluid is a detergent oil .. so it lifts oil residu..then flush and change oil .. this did a good job on my 1996 2.0L Jetta to quite down the lifters

[ZOMG.SR20]

dump diesel right in the cylinder or in the crankcase? thats new

[sandersb]

By oil I mean if compression in one or more cylinders is low, pour a small amount of engine oil into the cylinders through the spark plug holes. If the compression is increased or evened out after adding oil, it would indicate bad rings.

This is probably not the case with your motor. You may be looking at valvetrain damage or head damage. At least a bad head gasket.

http://www.nicoclub.com/FSM/misc/SR/

IF that link does not work, try:

http://www.rezlo.com/Pages/FSM/Fsm.htm

Good luck!

[ZOMG.SR20]

sorry found out the timing was bad