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engine tappety when hot!?

607 views 14 replies 5 participants last post by  Dave Hay 
#1 ·
well when i start car in works car park its almost always tappety. i dont thrash it to and from work (i drive equally both ways)

but when i start car in open car park at work where its been sat in heat for 9 hours its almost always tappety for a few mins

but when i start it at home from "cold" its fine

any ideas why it only does it in my works car park??

i am running catsrol magnetic 10w/40 synthetic oil
 
#4 ·
Dave Hay said:
just over 2k miles

full service on it
If the engine is high mileage then tappets get a tad clogged and different temperatures affect them.....next oil change use engine flush then a good oil, should sort it (i assume the service was done at a garage?)
If it doesn't the options are live with it, strip them and clean them or replace!
 
#5 ·
serviced it myself

engiens on 100k with fvsh though

im aware of the clogging lifters but why this happens from my work constantly and not from home confuses me. isnt the oil ive got pretty good?? (service sheet says mobil 1 was previous oil but it was a bit too thin getting for milage)
 
#12 ·
Two reasions why they should be noisy.
1. tappers and oil paths clogged and they get not enough oil == noisy. Use engine flash, some diesel or even I heard some people use automatic transmission oil to clean the oils paths.
2. high milage causes the tappets wear out and tolerances, gap increase. As a result the tappets loose oil== noisy. In this case the cure would be to use thicker oils like 15-50 and 20-50. Don't use cheap 20-50 oil though.
Try 1 before an oil change and use 2 to change the oil.
 
#14 ·
Dave Hay said:
yeah but why when cars been sat out in open air and the oils got pretty hot

is it just getting the oil too thin sitting in hot open space?
Oil's thicker when cold so would fill any wear in the tappets....thinner when warmer including sitting in hot sun.....some residue in the tappets can drain out resulting in temporary tapping..also if there is a prob with the tappets the lifters can wear as well doubling the problem
 
#15 ·
updated.... cams were throwing about a fair bit of oil inside the engine.. and every 20seconds or so a little was thrown out onto rocker (very little "dabs" but it got everywhere)

that means theres no real oil flow problems? or is there more checks i can do without fitting a gauge?
 
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