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Old 06-30-2019, 03:44 AM
Fmark Fmark is offline
Junior Member
 
Join Date: Oct 2018
Location: Nova Scotia
Vehicle: 1984 VW LT28D
Posts: 2
Default reply to ngoma

Quote:
Originally Posted by ngoma View Post
Hello, welcome to the forum.

One of the failure modes of the vacuum pump is excessive noise (clackey) but the vac pump should not have any effect on power or smoke. The engine can run fine without it. In fact, one of my future plans is to remove it, cover with a block-off plate, and plumb in a suitable electric vac pump and reservoir.

Oil leak that looks like it is from the vac pump could be from the valve cover gasket, head gasket, or the vac pump-to-cylinder head sealing o-ring.

Can you post a photo of the missing plug?

It will take more iterations of troubleshooting to identify the problem area and arrive at a good solution.

Can you describe more clearly the "dramatic increase in sounds?" What kind of sounds?

Tell us about the mechanic. Well experienced in the D24? The crankshaft pulley bolt, camshaft timing, and IP timing are items that require specialized D24 knowledge and tools, not common on other diesel engines.

Verifying the IP timing will tell us much. Also have the turbo checked. Were you able to hear its whine or whistle before? Can you hear it now?

Your answers will determine the next steps...
Thanks for the comments
The d24 does not have turbo
The mechanic is self taught (50's) with much experience on VW's. His experience is on 4 cyl diesels
He used the d24t.com website to get the timing procedures
This is his first experience with a six cylinder d24
Before start up after the rebuild he hand cranked the engine to make sure the new parts would not self destruct
It was necessary to crack the injectors one at a time while cranking to get fuel to the injectors
The engine then started and ran quiet, smooth and with better power than before rebuild and ran that way for about 10 hours. We were out touring on day 2---3hrs running speed 70 km/hr when it instantly got louder
My guess is ---noisier in the top end valves/camshaft, etc. generally louder overall---not enough lubrication possibly???
I will visit the mechanic today and take a picture of the vac pump
I had the fuel tank cleaned out about 8yrs ago
I changed the fuel filters(2) about 4000km ago and installed a fuel vacuum guage
The guage was not calibrated but in relative terms from past use the filters are looking like they are in good shape
I was thinking about replacing them just so we could eliminate them as a possible reason for the power loss
I am not very good at computers and am learning how to communicate on the site out of necessity to solve my present problem
Fmark
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