Unless you have VVTi you have a NON interference engine so pistons and valves coming together will not be a issue.
Cylinder 1&3 Misfire - Coil packs replaced still CEL (1 Viewer)
- Thread starter bajaphile
- Start date
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He has a vvti
It sounds like a head gasket to me, if both adjacent cylinders have exactly the same low pressure.
I doubt any other issue like worn valves would result in exactly the same low pressure in both cylinders...
Just in case I would redo the compression test -if they are both exactly the same, then you're essentially measuring the same space - ie, there is a leak though the head gasket between the cylinders.
The OPs idea to apply air to cylinder A while having a pressure guage in cylinder B would confirm it.
I could be wrong though, I have been at least once before.
Do you know if the PO ever had the head gasket replaced?
I've no idea on the 2uz-fe head gaskets, but I know on some older cars, the head bolts are meant to be re-tensioned after xxx kilometers. I don't know if this is the case with these head gaskets.
If the PO did get have a head gasket go, its possible they did replace it, but either didn't tighten them enough, or retention them, or perhaps did them too tight...
Just a thought...
If its easy enough to get to the head bolts... after you've exhausted all other options... I'd try re-tensioning them, then pressure testing again, prior to going the full gasket replacement.
I doubt any other issue like worn valves would result in exactly the same low pressure in both cylinders...
Just in case I would redo the compression test -if they are both exactly the same, then you're essentially measuring the same space - ie, there is a leak though the head gasket between the cylinders.
The OPs idea to apply air to cylinder A while having a pressure guage in cylinder B would confirm it.
I could be wrong though, I have been at least once before.
Do you know if the PO ever had the head gasket replaced?
I've no idea on the 2uz-fe head gaskets, but I know on some older cars, the head bolts are meant to be re-tensioned after xxx kilometers. I don't know if this is the case with these head gaskets.
If the PO did get have a head gasket go, its possible they did replace it, but either didn't tighten them enough, or retention them, or perhaps did them too tight...
Just a thought...
If its easy enough to get to the head bolts... after you've exhausted all other options... I'd try re-tensioning them, then pressure testing again, prior to going the full gasket replacement.
Last edited:
- Thread starter
- #64
Confirmed blown HG at 3&5.
- Thread starter
- #66
I gave up and took it to a trustworthy mechanic that my friend has used for all his Land Cruisers for the last 15 years. He just called me with the confirmation! It appears that the HG blew between 2 cylinders and did not effect water passages. I'll see if he can save the gasket for me to post pictures.
my cruiser is doing the exact same thing, crap. Guess I'll do a compression test tonight...
actually my truck barely runs, so now I"m back to thinking it's electrical
thought i should circle back on this for future mudders, it was just a clogged cat on the driver's side. if you are having these issues, disconnect the exhaust at the cat on that bank and see if it fixes the issue.
You can use a vacuum gauge to check for a blocked exhaust, a vacuum gauge is a good tool to have in your tool box if you do your own diagnostics.
Thank you for checking back in and letting us know what you found.
This is how everyone should be updating their posts with solution and updates in the original post. Great job @bajaphile
