What are the odds?

tpunx99GSX · 07-16-2008

So as some of you may have seen i thought i bent some valves a couple days back when the exhaust cam was reversed.
I took off the head, and the cams look to be seating proprly and closing all of the way, but when i hook up the Compression tester, it reads 0 across the board.
One would think that even if the valves were bent but look to be seating properly it "SHOULD" at least get a small amount of compression. Mind you, When the cam was reversed, it was only turned over once, i heard a noise much like a popping once. and stopped immediatly and found the problem.
When im trying to turn it over now it sounds like its just not getting spark, that the crank and cams are moving but nothing is happening. And I can hear some exhaust out the tail pipe.
What are the odds my Compression Tester got fucked up between now and the last time i used it. Which was about a month ago? Its just a cheap one from Autozone. This is really bothering the hell out of me. Im going to check for spark tonight on the spark plugs because when i took the plugs out last night they were wet.
Thanks Guys,
Tom

Super Bleeder!! · 07-16-2008

Use the tester on a running car real quick, just to see if its still working.

Matt D. · 07-16-2008

Of course you will hear air coming out the exhaust, that would simply rule out the intake valves being completely messed up.

A leakdown test wouldn't hurt anything.

A visual inspection of the valves doesn't mean they were closing all the way. The slightest of bends would cause them to not seal and leak.

**scheides** · 07-16-2008

Yup, test out the tester on another known-working car quicklike and see how it works. Doesn't sound good.

Matt D. · 07-16-2008

Quote:

Originally Posted by scheides

Doesn't sound good.

Tom is just growing up in the world of cars... He went from poorly painted body kits held on by wood screws getting torn off by JET's driveway to ruining engines by improperly installing cams.

It sucks, hope for the best. It'll all come around in the end.

MustGoFaster · 07-16-2008

Valve can be just ever so slightly bent, but the springs will bend them back a little to make it look ok. Use water to test. Flip it on the side and fill the port. As long as it doesn't just run into the chamber it should be ok. Use a little anti rust spray after.

**Halon** · 07-16-2008

Like has been said, looks mean nothing. They can look fine, but actually bent and cause 0 compression. I'm living proof of that. I've bent more valves then I care to remember

tpunx99GSX · 07-16-2008

Yeah tonight im going to test it out on a friends car, then if the gauge is workin then ill take the head off AGAIN and take it to a local shop i already called and have them rebuild it. Hopefuly they will be able to turn it around next day and i will be able to go to mod.
What sucks is that if the valves are bent then im going to curse the DSM Gods. Last night my friend was over and i was showing him the damage. They looked perfect though. So i had him grab a coin and asked the dsm gods to bless the coin and tell me if i should put the head back on and check for other things or if i should take it to the shop and have it checked out. Tails was install, Heads was have it checked.
First Flip: TAILS
My friend then said i should do 2 out of 3.
Second Flip: Heads
Third Flip: TAILS!
My friend then said maybe i should do 3 our of 5. LOL

Project2G · 07-16-2008

Quote:

Originally Posted by tpunx99GSX

Yeah tonight im going to test it out on a friends car, then if the gauge is workin then ill take the head off AGAIN and take it to a local shop i already called and have them rebuild it. Hopefuly they will be able to turn it around next day and i will be able to go to mod.
What sucks is that if the valves are bent then im going to curse the DSM Gods. Last night my friend was over and i was showing him the damage. They looked perfect though. So i had him grab a coin and asked the dsm gods to bless the coin and tell me if i should put the head back on and check for other things or if i should take it to the shop and have it checked out. Tails was install, Heads was have it checked.
First Flip: TAILS
My friend then said i should do 2 out of 3.
Second Flip: Heads
Third Flip: TAILS!
My friend then said maybe i should do 3 our of 5. LOL

Perhaps your friend should have grabbed a different coin? PS: Who flips a nickel anyways? The dsm gods are toying with you. That's what happens when you spray your whole car with a rattle can!

Pushit2.0 · 07-16-2008

A engine turning over with no compression sounds very different then an engine with compression, it turns over faster and does not make a thump/compression noise. Test the tester and a leak down test will tell you where your air pump is pumping all the air to. Did you wait for the HLA's to bleed down before testing? Normally 2-3 hours is good.

~John

blackrosenova400 · 07-17-2008

You should be able to tell easily if your compression tester is nudged up. Have someone turn over the engine and feel the air coming out of the spark plug hole during the compression stroke. Heck put your hand over each one and it should give you an idea of whats goin on.

tpunx99GSX · 07-17-2008

Last night after work i took the tester to a friends house. Yeah so today/tomorrow i will be putting on a new head.

Pushit2.0 · 07-19-2008

Make sure you put the cams in right, its not like racing in R you need to be D for things to work out. Do you turn the motor over by hand after you install the timing belt to make sure nothing hits?

~John