96 P38 2.5TD strange overheating issue

Datatek · Feb 15, 2014

ySo said:
Will check the rad tomorrow. Just fit the PSI Power Box (bought it before this happened), it's pulling brilliantly til about 50-55 mph then if I keep the foot down it loses power til I take my foot off and just get up to speed slowly.

When it does overheat from trying to get past 55 with power it goes back to normal temp pretty quick when I stop putting my foot right down.

Keep overheating it and the head will crack if it hasn't already. If you have got any sense you'll take the power box off untill you have fixed the overheating problem.
Sounds like it's going into limp mode due to the overheat.

dean68uk · Feb 15, 2014

Could be you have a plastic impeller waterpump. These break up sometimes. Check both your top waterhoses are hot.

ySo · Feb 15, 2014

Problem is I don't know what's who under there.

dean68uk · Feb 15, 2014

Look at tha radiator and you will see a hose on the left and right side of it. Check when engine is hot that both hoses are hot. This is to check the coolant flow

wammers · Feb 15, 2014

dean68uk said:
Look at tha radiator and you will see a hose on the left and right side of it. Check when engine is hot that both hoses are hot. This is to check the coolant flow

Looking at rad from front of car. Hose to right is inlet hose. Hose to left is outlet hose. Coolant enters through inlet hose and passes down right hand side of radiator then up left hand side and out through left hand hose to thermostat housing. Both hoses and ALL of radiator should be hot.

ySo · Feb 15, 2014

Thanks guys. Will give this a check later.

Do you not reckon it's the viscous coupling as suggested earlier? As when the engine is at temp I can stop that fan easy.

Datatek · Feb 15, 2014

ySo said:
Thanks guys. Will give this a check later.

Do you not reckon it's the viscous coupling as suggested earlier? As when the engine is at temp I can stop that fan easy.

If the RAD gets hot all over, the the viscous is fecked. If the RAD is cold in front of the fan the viscous coupling will not lock up.

ySo · Feb 16, 2014

Can't get to the bottom of the rad. But both pipes are roasting hot, reckon it's the viscous coupling then?

Datatek · Feb 16, 2014

ySo said:
Can't get to the bottom of the rad. But both pipes are roasting hot, reckon it's the viscous coupling then?

No, you need to check the RAD bottom. The RAD top and both hoses can get hot if the baffle in the header has failed but the RAd will still be cold.

96 P38 2.5TD strange overheating issue

Datatek

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dean68uk

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ySo

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dean68uk

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wammers

No longer with us, RIP

ySo

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Datatek

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ySo

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