Help!!!!!

 

Major Compression Problem

 

6 ½ months in the making, and its F**KED. I have had a total rebuild from head to toe. Tried firing it up last week to find it was only running on 3 cylinders. Compression test show that cyl 2,3, and 4 are all below 50.

“CAS” Rebuilt the bottom and I built the top. They say that the bottom is bomb proof so they are blaming the heads. They are implying that I have not seated the valves in properly or that the valves are bent. I can assure you that neither of these are the case. I have rebuilt dozens of engines using the same techniques with no problems whatsoever. CAS have said if it’s not the valves then it must be the followers. I stripped down the followers and cleaned then out, also blew them through with an airline. Again this is common practice and has not caused problems in the past. After stripping them I reassembled them using a small amount of std engine oil, and tested that they still function correctly by pushing down on the small piston. The ones I found to be stiff, I drained some oil out and tried again until they were perfect. CAS are saying because I used std engine oil and not 3 to 1, the valves are being forced open all the time hence the reason for bad compression. Don’t get me wrong, I know how these things work and if one was block indeed it would hold open the valve. The problem I have now is that CAS want to strip down the engine again and rebuild all the followers, resulting in a massive amount of cash. It will also take another month due to their busy workload. Don’t forget they have had my car since October 2003. :mac1:

 

PLEASE PLEASE PLEASE Can any one think of ANYTHING else it might be, as I am flat broke and want to drive my baby once again. :hyper: :hyper: :hyper:

 

PS. I bought the heads of a trusty member, so unless he was misinformed then they should be A1.

 

I want to take the car elsewhere, but Iam worried that if anyone else touches it. CAS will void the warranty.

 

Next step involves a petrol can and a match. "This is no jest" :cry: :cry: :cry:

Do a cylinder leakage test - this will pin point the problem ;) I have one arriving VERY soon if you need any help ;)

 

CheerZ,

 

Andy

Dave

 

Pull it out ffs the place is a freekin JOKE there are people on here who will sort it for you mate, dont let those gobshites do any more damage to her :nono:

Whats CAS and where are they?

"garage" :xxx: in the port

Burn Baby Burn!!!!!!!!!!! :cry: :cry: :cry:

 

 

5 litre can should do it.

Hi Dave,

 

i dont know what you've built - is there any chance that the valves couldn't be shutting because of some loose carbon deposits getting stuck. Ive heard of this happening on engines that have been turned over while on the bench.

 

Regards,

 

alex

Alex

I think its more than carbon build-up mate, as if the valve wasn’t sitting perfectly. My compression wouldn’t be great but It would be better than 45-50. I either have bent valves or the followers are rock solid causing the valves to open prematurely.

 

 

Running some ATF through the oil system could well cure it, but CAS will not allow this.

Dave

 

Pull it out ffs the place is a freekin JOKE there are people on here who will sort it for you mate, dont let those gobshites do any more damage to her :nono:

Chris just been up there and the Plenum is half off. This meens Andy wont be able to test it on Saturday and I will have to spend more hard earned cash.

AAARRRAAAGGGGHHHHHH!!!!!!!

 

Come see what daddys got for ye :mad:

 

AAARRRAAAGGGGHHHHHH!!!!!!!

 

Come see what daddys got for ye :mad:

 

 

Easy tiger give us a bell i'll do my samaritans job :D

Why don't you do a wet compression test, that will tell you if it is the bottom end or the heads? You can still do it with the plenum off!

 

How many miles has it done since it was rebuilt, maybe you haven't given the rings enough time to bed in?

deffo as andy says: a cylinder leakage test is required. it will pinpoint the problem quickly & easily.

 

you can make one out of an old spark plug, some copper tubing, some hose & an airline connector!! ( break the ends off the plug, drill out the centre, braise the copper pipe to the plug, attach the hose to the pipe with a connector in the other end - true blue peter stylee ;)) - plug it into an air compressor & off you go. wont have a gauge to see the pressure loss, but you will still hear it leaking.

 

DONT buy a cheap one - there crap & the gauge doesnt read accuratley anyway. might as well use the patented design above :D

Dave i'm feeling for ya, do you want me to crash into yours then we'll both be sorted?

 

sorry mate!

Dave, if they say it IS the lifters then tell them you want proof before they go ANY further!!! TBH even if you did build the heads they should have checked them before fitting them to the engine. They should also have done a leakage test before refitting the engine - especially with unknown heads.... Its just common sense isn't it? :confused:

I asked them did they check that the valves were closed prior to fitting the heads. They got round this by saying they did not check this due to fitting the cams AFTER the heads were bolted down. They did not do a leak test until the engine was fully assembled. I told them that I rebuilt the heads and that I had them pressure tested. So based on my info they did not check them. Fare enough Andy, Its a total cockup job. I should of either done the whole thing myself or got you to do it. Whats done is done though, I can only try and resolve it as cheap as poss.

 

Andy I will still require you assistance as and when the top is stripped yet again. It should be ready either later on today or Wednesday.

 

Scoops have you not sold it yet

Guess What

 

Steve at CAS has just removed all of the followers, only to find out that they are all tight or stuck open. He has ran a leak and compression test with cams out, all is ok. Thank F**k for that. Its cost me another £300 plus a fiver for the petrol can lol. My baby should be back very soon.

 

COME ON :dance: :dance:

good shit mate :D

Dave, thats fantastic news bud!!!! You sounded so depressed yesterday so about time for some good news eh ;)

:hyper: :hyper: :hyper: :hyper: :hyper: :hyper: :dance: :dance: :dance:

Sad tale with a happy ending! You got any more of those stickers for when you get the car back?

LOL. You know what Zack. I forgot all about them and when I eventually got back to the Wirral (midnight). I pulled in to a petrol station and everyone was staring at me. At first I though me fly was open or somethin. Paid the cashier got back into the car still without noticing (I was a zombie at this point). A Cavalier pulled up to me revving his engine, then wheel spinning right next to me. I thought you ****er, then had no choice to toast him. In the morning I was thinking what the hell happened last night. Opened the front door and my jaw dropped. NNNNNOOOOOOOOOOOOO! Don’t tell me that I drove around with them on FFS. Instantly I pulled them off and stuck them on me bro's Maestro. (looking good).

 

You must have a pic so everyone else knows what the hell we are taking about.

 

Don’t suppose you have any photo's of that day, and if poss that Scooby doing the drifting.

there you go rude boy http://www.300zx.co.uk/forums/showthread.php?t=33286