Mobile Mechanic - Mk1 MX5 Turbo

Mobile Mechanic - Mk1 MX5 Turbo

Author
Discussion

tb235

Original Poster:

18 posts

143 months

Friday 14th November 2014
quotequote all
I was wondering if anyone knew of a good mobile mechanic to do a compression test that happened to know about mx5 turbos?

I have recently bought a mk1 mx-5 running a Greddy Turbo. I drove it down from London to Exeter and on the way down the temperature gauge started climbing, stopped let the engine cool and then went on my way again. When I got to Exeter and turned the car off I could hear thumping come from the block, the noise didn't start straight away, but after a couple of minutes whilst unloading it.

Anyway tested the water pump and the thermostat and they seem to be working. I now want to check the head gasket hasn't gone, hence the need for a mobile mechanic to do a compression test.

It is still using the standard radiator, but before I start fitting alloy radiators etc. I want to check everything is running as it should and there isn't a fundamental problem.

trackerjack

649 posts

184 months

Friday 14th November 2014
quotequote all
I agree, I bought my comp tester years ago and have checked many cars, some have even been mine!
An easy check on a suspect H/gasket fail is to start the engine and check if the hoses go hard which indicates pressure in the coolng system.
Sometimes a very small breach will not show on the comp test but will quickly pressurize the cooling.

Generally if the engine is gurgling and the water is being pushed out its head off time.

(my experience of marginal cooling systems stems from 30 years track work in Triumphs including Stag and Sprints so have done that worn tee shirt!)

MX-5 Lazza

7,952 posts

219 months

Friday 14th November 2014
quotequote all
Sounds more like the cooling system to me. I'd suspect a partly blocked rad. A turbo MX5 will not put any extra demand on the cooling system unless you are pushing it.

tb235

Original Poster:

18 posts

143 months

Monday 17th November 2014
quotequote all
Thanks for all responses, I'll just get a compression tester in that case and check the hoses.

Want to use it as a track day car so the cooling system will have to be upgraded

MX-5 Lazza

7,952 posts

219 months

Monday 17th November 2014
quotequote all
If you suspect the head gasket might be gone then you should get a sniff-test done on the coolant. 99% it'll be the rad though.

VladD

7,854 posts

265 months

Monday 17th November 2014
quotequote all
Could it be air in the system and/or a stuck thermostat?

Vin

67 posts

206 months

Monday 17th November 2014
quotequote all
have you taken the plugs out and looked at them? colour could indicate an issue

skinny

5,269 posts

235 months

Tuesday 18th November 2014
quotequote all
start off with a genuine mazda radiator cap.