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TR4a engine checks

tr4a engine

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#1 qkingston

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  • Location:Helensburgh, Argyll & Bute
  • Cars Owned::GT6 x 3, Herald, Dolomite, Stag, Cobra, Jaguar XK

Posted 08 May 2018 - 08:30 PM

So before I get to the point of serious dismantling, can anyone advise what engine checks would be worth doing whilst it's still all connected up and able to run? I was told that a fair amount of engine work was done on the car (65 TR4a) in the States about 10 years ago (but only about 8K miles ago) but I haven't been able to find out exactly what was done (or why). The engine seems to run pretty well, oil pressure comes up quickly, idles fairly smoothly, no obvious noises, exhaust a little smoky on initial choke but seems to be ok after a while. I did detect a little oil when putting my hand to the exhaust, but only a little. Usual oil leaks under the car, haven't pinned down exactly where from yet. So what checks and tests would be worth doing at this stage to inform later decisions on engine work? Compression I would guess would be a good start?

Any thoughts gratefully received



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#2 Geko

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  • Location:Kuala Lumpur, Malaysia
  • Cars Owned::TR4A '66, TR3A '59

Posted 09 May 2018 - 01:49 AM


- Compression test

- Visual cross-contamination oil/water and white smoke at the tail pipe

- Overheating 

- Lower engine knocks and rattles

- Upper engine tappets/follower noise and tappet clearance check

- Crankcase pressure from dip stick 

If there's no obvious red flag on any of the above you can fairly assume that the engine is reasonably healthy 

Edited by Geko, 09 May 2018 - 01:50 AM.

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#3 PYU940F

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  • Location:Westerham Kent
  • Cars Owned::TR4 sold 1971
    TR4A sold 1973
    TR4A written off 1975
    TR4A bought 1975
    '67 split screen VW camper

Posted 09 May 2018 - 04:07 PM

If the engine runs as you describe it then I suggest you do nothing apart from a regular service. As they say; if it ain't broke don't fix it and it
certainly does not appear broke to me.

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