AtlaDas

or is there a kind of pump inside the radiator? Because I didn't do anything about the water pump behind the timing belt.

tlister67

My 78 had cooling lines but the 82 donor engine did not. I decided they would offer more opportunities to leak and went without and installed the 82 rad as well. Benefits of having a running parts car.

mark kibort

if you are at operating temp and the bottom hose is cold, you have an issue. in fact, is that is the case, more than lkely, a few mins more and it should overheat ... on the warm up phase there is little difference between a working waterpump and one that is not spinning. on the warm up cycle the water is just circulating around the heads and block. (no radiator).
if it starts to over heat, check the hoses again.. bottom hose should be cold. in this case, the Tstat is stuck or the pump is bad. usually the pump

AtlaDas

I started it today again, started directly. Let him run for less then a minute and checked the circulation.
No circulation. Also yesterday I couldn't fill him up till the 15 litres.

The hoses are both cold and the temperature gauge was directly at the top. Also the exhaust was extremely hot.
Taking that in account and the comment of Mark ... most probably the pump doesn't operate.
So back to research and see how I can replace that.

Is there a way to test the pump during assembly? Because I can't start the engine when it is apart ...

AtlaDas

Just saw the great write up of Dwayne (1987 Timing Belt and Water Pump Procedure).
It is not the same version, but it'll certainly be of great help.

Thanks guys !

Wisconsin Joe

https://rennlist.com/forums/928-foru...with-pics.html

Imo000

Takes a lot longer than 1 minute to get the engine warmed up. Your engine was still cold. How much coolant were you able to put in the car? Your temperature gauge could be faulty too. Get an infrared temperature gun and measure the engine temperature.

mark kibort

how do you know there is no circulation. 1 min doesnt do anything.

if the impleller is firm in the pump , it is fine. (new one) thats all you can test.

check the flow. the only way to test flow is to wedge t-stat open. then do the test i was revering too. ... its the only way to confirm flow. you then pour water from the hose into the intake of the water pump and divert the exhaust of the water pump on the ground. if it pumps , the pump is working . the hose can keep up with idling water flow. if nothing is moving, the pump is toast.

linderpat

My oil cooler lines need to be replaced. Well, just the top one, as the outside hard plastic material is cracked, and the hose is weeping oil. However, the two hoses come as a single part (928 107 037 05). It is an expensive part (cheapest I saw for OEM was $300).
After reading this thread, the first question is - is it necessary to even have these hoses? It seems to me that they may not be needed?
Second, whether needed or not, my inclination is to replace them anyway, since they are part of the original design. (altho I could just pull them plug the radiator and block, and save the hoses like I did with the air pump and its hardware). In any event, if I replace, what are the "gotchas"? Do I risk breaking my original side tank on my radiator? What else?
Thanks all.

GlenL

Take the hoses to a hydraulic hose shop and ask to have them re-lined. I've done several pairs and it's like $50. You may have to try multiple places as the fittings are (of course) some weird metric size. Check the lengths carefully as too long is as bad as too short. I've used Pirtek which is a national chain.

Ducman82

you can always have them rebuilt. (see above). i added the radiator cooler to my car as it did not come with it from the factory. helps keep temps down on stop and go.

linderpat

what about pulling them off the block side? Do I need to worry about breaking threads?

Ducman82

just counter hold the adapter in the block, it is a must. i wanna say greg has caps you can screw on to the adapter to block off the adapters, if thats what you are wanting do.

GregBBRD

And I make replacement hose sets from Teflon lined stainless hose that are better and cheaper than the stock hoses...

Ducman82

Yes you do! not sure how i forgot that part, being i have them.