Author Topic: coolant leak confirmation (Read 3168 times)

Twenty · « **on:** August 24, 2010, 10:23:58 PM »

hi guys

A couple of weeks ago my engine ran hot due to the outled pipe on the head corroding. I didn't run it dry and deffinantly pulled over before it stopped. So i fixed the head up and was able to do test it out without any problems. Park it in the shed to organise registration to find it leaking coolant.

this is probably a weeks worths.

just checking that this is a head off job for a gasket or a crack and not some quick fix tighten a hose clamp or something i have forgotten?

it leaking on the RHS of the engine and running off the AC compressor, sump and engine mount i think:

this is looking from the top of the engine down to the AC comressor, you can see the chain tension at the bottom to give you some orientation:

Might be time to get that touque wrench and pull the head.

Thanks Glenn

DesktopDave · « **Reply #1 on:** August 25, 2010, 07:49:13 AM »

I'd suspect a damaged profile gasket. Might be far simpler than you're thinking. I'd absolutely do a compression check or a leak-down test first, just to be sure.

If you're not sure what I'm talking about, the top of the head sits on the front plate of the engine, where the water pump & thermostat are. Between that and the head is a very small gasket that meets the head gasket. They had some recalls to fix them for earlier M42s. I'm reassured that you don't need to pull the head to replace that gasket...look for DVmotorsport's thread, he found a way to do that.

Twenty · « **Reply #2 on:** August 29, 2010, 05:40:37 PM »

i assume that if it hold normal compression then the HG is fine and it confirms a damaged profile gasket?

i've had a look around and can find a heap of info and run throughs for replacing the head gasket, but can't find that thread on replacing the profile gasket within taking the head off? mind pointing me in the right direction?

thanks

Twenty · « **Reply #3 on:** August 29, 2010, 06:03:52 PM »

http://www.m42club.com/forums/showthread.php?t=1265&highlight=profile

found this by a different user, but the pics are dead. and without the picks it seems to be lacking a bit of info. has this info been posted up anywhere else ?

Twenty · « **Reply #4 on:** September 02, 2010, 05:50:07 PM »

has anyone replaced there profile gasket without removing the head?