Well got some weird results.....

 

Back of engine......

 

Drivers side Passenger side

6 = 172...../.....3 = 162

5 = 170...../.....2 = 162

4 = 162...../.....1 = 162

 

Front of engine.......

 

Cylinder 6 was at 180 as it was first one I tested

cylinder 5 was at 172 second one tested......

 

I went back after testing passenger side bank just to be sure and they came out as above, a bit lower...... haven't used tester in a while so retested to make sure nothing was wrong with it......

 

Worried as the rears are so high on cylinders 5 & 6 ????

 

Worrying now after Stephens nightmare with NA engine why they are reading so high and what pistons are in there........ am I just panicking??

they are healthy figures

As above there good numbers, if they were 180 ish I'd be getting curious but 160-170 is a good TT. There's some easy ways to spot an NA if you know what your looking for, if your overly worried. But I think it's just a healthy TT. Also mate bear in mind the accuracy of the compression tester, 10psi out at those kinds of pressure isn't a big mis read, it's the consistency that's most important.

As above there good numbers, if they were 180 ish I'd be getting curious but 160-170 is a good TT. There's some easy ways to spot an NA if you know what your looking for, if your overly worried. But I think it's just a healthy TT. Also mate bear in mind the accuracy of the compression tester, 10psi out at those kinds of pressure isn't a big mis read, it's the consistency that's most important.

 

I was shocked Stephen that it was that good to be honest as I was half expecting them to be lower..... Next I will be getting someone to check the radiator with a gas leak tester to see if it is head gasket.....

 

Right, the platinum plugs were sooty black, round edge and around the electrodes.... so have gone with what Noel said in another thread and used BCR8ES set at 0.9mm........

I have also replaced the O'rings on the balance bar with nice new ones....... and had a look for any vacuum leaks while I was there......

I will be cleaning the coil packs connectors in the next few days as they are a touch green.....

Yeah, it could still have failed from the water jacket to oil jacket, but it looks like the bottom end is ok...get it tested. Replacing a head gasket is a lot easier/cheaper than rebuilding the while engine. If your plugs are a dry sooty black that indicates poor combustion, think boost leaks, weak spark etc. oil is more gooey where as black soot and wet is fuel fouled.

It sounds like it's been over fuelling so lots to check.

Right then Stephen...... boost leak test coming up........ after the gas leak test......

What else should I check.....??....... Oxygen sensors??...... ECU coolant temp sensor??

Timing....??

Thanks for that Stephen..... have so much going on at the moment that I can't think straight........

 

Got idea of best order to do tests in???

Yep, yep and yep, TPS, fuel damper anything that effects how much fuel goes in at a given time. I'd start with the simple stuff, clean properly made connections and a sealed system. You fitted that engine didn't you?

Yep, yep and yep, TPS, fuel damper anything that effects how much fuel goes in at a given time. I'd start with the simple stuff, clean properly made connections and a sealed system. You fitted that engine didn't you?

Yep...... threw it in and she started first time....... lol

 

Right well have loads of time to do this as I resigned from work today......... so now unemployed....... but able to work full time on the Z for the moment....... till the wife notices..... lol

 

I took her out for a spin after fitting the BCR8ES plugs, replacing the o'rings on balance bar and she now stalls hot and cold when I pull up to a stop at junctions or revs drop...... bloody nightmare now.....

You got aftermarket Bovs? Have you preformed a boost leak test?

 

Right, the platinum plugs were sooty black, round edge and around the electrodes.... so have gone with what Noel said in another thread and used BCR8ES set at 0.9mm........

 

Generally speaking, unless you're over 500bhp or running high boost levels, you don't need BCR8ES and they will be too cold a plug for you. BKR7E would be fine.

Edited November 30, 201411 yr by Noz

Generally speaking, unless you're over 500bhp or running high boost levels, you don't need BCR8ES and they will be too cold a plug for you. BKR7E would be fine.

 

Bugger........ lol

 

I will go get a set in a while...... Thanks Noel....... Would that cause stalling like I am getting when revs drop?

 

Russ