[T3] type 4 2000cc oil pressure and overheating problem

pablo vial de ruyt pablo_vent at hotmail.com
Fri Dec 9 04:21:43 PST 2011

Hi, i from Chile and looking for real empirical experience, need help for oil temp problem with my automatic Westfalia 1978 (stock 2000cc, type 4 - dual carbs solex 32-34 pdsit-3), my interest is only summer use with long travels with my family (need fiability) ....temp range in my country in summer is 75-95 Fº. Rebuilt 20 or 30 type 1 engines without problems, but first experience with a type 4. Is second time rebuilt my engine in 2 month.....first time (without fuel pump push rod install) overheating and melted after only 40 miles run......possible causes: plugs white lean, timing incorrect 10-12º btdc, 7,8 CR, possible low oil pressure, etc....Now i rebuilt again (very expensive) crank completly machined 0,25 and check, new bearings, new piston and barrels kit, heads ok, and install aftermarket Schadeck oil pump (1829 CB performance for type4/914) fit ok , holes alignment, but difference size holes oil pump, 7,3 CR , 3º btdc to 850 rpms with 28 max (without vacuum hose connected), and increase 125 fuel jets to 140 size....This time installed oil pressure and temp gauge for better control.

First check:
Runs very well but 20 minutes or 3 miles 195 Fº oil temp...with 10-40 psi oil pressure range.....

Second check:
With 88 Fº exterior temp........20-50 psi cold engine oil pressure.......and hot:
70 km/h 
2500 rpm
7 idle - 25 psi max oil pressure
230 Fº oil temp
20W/50 oil
After highway road to my house oil temp 240 Fº and oil pressure max 20 psi.

Check again timing and without vacuum hose 28º max....with vacuum hose 35º aprox.....and 3º btdc idle.....idle is fine???
Considerer this.......but need make sure correct position cooler flaps 100 open and need jets recommend for dual solex 32-34 pdsit-3, now installed 140 mains, idle 52,5, airs 160, stock rest. 
My fear is overheating again.

Appreciate your advice
Best regards and thanks. 
Pablo V. 		 	   		  
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