Wilboro
Well-known member
Some of you might recognize my project from over on the "other" forum, but I've run into a problem and I just don't know what to do at this point.
So I'm finishing up the rebuild on my '97 110 300tdi and I noticed two things.
1. Once the exhaust system was fitted I started noticing a bit more white smoke than I remembered. When the engine is brought up to higher revs a lot of white smoke is coming out. It seems to be most just before the waste gate dumps the boost pressure. At low rev's and idle there is very little exhaust but when you do see wisps it's whitish.
2. I thought initially that the coolant in the expansion tank had dropped, however I'm not sure now. The tank had been hanging off the side of the engine with a bungee cord and may have just leaked.
Since refilling to the line and attaching it more securely I can't see any noticeable difference in coolant level after running it multiple times.
The truck has not been run on the road simply driven in and out of my garage and idled for up to half an hour. It doesn't overheat in these circumstances and it starts up and idles smoothly.
There is a small bit of pressure in the rocker, but if you undo the oil filling cap and leave it loose it won't get blown off (bounces a bit).
After inspecting the expansion tank when the truck is running, it looks like there might be some tiny bubbles in tank, but it doesn't seem regular and they are very hard to see.
I've also checked to see if there was any brake fluid in the vacuum hose, I've heard a leak on the master it can push brake fluid into the engine. But the lines are bone dry.
When I bought the truck in Holland I had the head gasket redone as it had an external leak on the 4th cylinder. What exactly was done I can't tell you (was it skimmed? not sure) but there is no sign or sound of an external leak. And it drove with no problems before I took it off the road.
Here are the things I've done that I think could have some sort of bearing on the situation.
I've replaced the fuel lines and tank.
I've replaced the turbo and exhaust gasket(boost pressure has not be tested yet)
I've changed the timing belt (I'm certain all the marks and pins line up) but...
The engine wasn't taken apart other than to replace the t-seals, replace the rear main, re-seal the sump and clean up the intake plenum.
All the hoses for the cooling system, and inter cooler are new.
Anyhow I'm kind of at a loss what I should do next. I know a compression test would be a good idea, and there is combustion test (where the fluid changes colour). I could also do a pressure test on the coolant system.
I don't have any of the tools to do these tests and they don't seem to come too cheap so before I start buying up diagnostic tools I'm looking for some advice with how to proceed from those who are more experienced.
Will
So I'm finishing up the rebuild on my '97 110 300tdi and I noticed two things.
1. Once the exhaust system was fitted I started noticing a bit more white smoke than I remembered. When the engine is brought up to higher revs a lot of white smoke is coming out. It seems to be most just before the waste gate dumps the boost pressure. At low rev's and idle there is very little exhaust but when you do see wisps it's whitish.
2. I thought initially that the coolant in the expansion tank had dropped, however I'm not sure now. The tank had been hanging off the side of the engine with a bungee cord and may have just leaked.
Since refilling to the line and attaching it more securely I can't see any noticeable difference in coolant level after running it multiple times.
The truck has not been run on the road simply driven in and out of my garage and idled for up to half an hour. It doesn't overheat in these circumstances and it starts up and idles smoothly.
There is a small bit of pressure in the rocker, but if you undo the oil filling cap and leave it loose it won't get blown off (bounces a bit).
After inspecting the expansion tank when the truck is running, it looks like there might be some tiny bubbles in tank, but it doesn't seem regular and they are very hard to see.
I've also checked to see if there was any brake fluid in the vacuum hose, I've heard a leak on the master it can push brake fluid into the engine. But the lines are bone dry.
When I bought the truck in Holland I had the head gasket redone as it had an external leak on the 4th cylinder. What exactly was done I can't tell you (was it skimmed? not sure) but there is no sign or sound of an external leak. And it drove with no problems before I took it off the road.
Here are the things I've done that I think could have some sort of bearing on the situation.
I've replaced the fuel lines and tank.
I've replaced the turbo and exhaust gasket(boost pressure has not be tested yet)
I've changed the timing belt (I'm certain all the marks and pins line up) but...
The engine wasn't taken apart other than to replace the t-seals, replace the rear main, re-seal the sump and clean up the intake plenum.
All the hoses for the cooling system, and inter cooler are new.
Anyhow I'm kind of at a loss what I should do next. I know a compression test would be a good idea, and there is combustion test (where the fluid changes colour). I could also do a pressure test on the coolant system.
I don't have any of the tools to do these tests and they don't seem to come too cheap so before I start buying up diagnostic tools I'm looking for some advice with how to proceed from those who are more experienced.
Will